[X] Watch a Mystery anime with another genre, theme, or demographic not listed above: Series Must be listed on the anime page on MAL.
[X] Watch a Mystery anime that started airing in Winter: Series Began airing during the following months: January, February or March.
[X] Watch a Mystery anime that started airing in Spring: Series Began airing during the following months: April, May or June.
[X] Watch a Mystery anime that started airing in Summer: Series Began airing during the following months: July, August or September.
[X] Watch a Mystery anime that started airing in Fall: Series Began airing during the following months: October, November or December.
[X] Watch a Mystery anime that started airing the same season you joined MAL: Series Any year; Winter: Jan to Mar; Spring: Apr to Jun; Summer: Jul to Sep; Fall: Oct to Dec.
[X] Watch a Mystery anime that started airing in 1980 or before: Series
[X] Watch a Mystery anime that started airing between 1981 and 1989: Series
[X] Watch a Mystery anime that started airing between 1990 and 1999: Series
[X] Watch a Mystery anime that started airing between 2000 and 2009: Series
[X] Watch a Mystery anime that started airing between 2010 and 2019: Series
[X] Watch a Mystery anime that started airing in 2020 or later: Series
[X] Watch a Mystery anime with 10 episodes or less: Series
[X] Watch a Mystery anime with 20 episodes or more: Series
[X] Watch a Mystery anime with episodes that are 15 minutes or less each: Series Must have more than one episode.
[X] Watch a Mystery anime adapted from a Manga: Series Does not include 4-koma Manga or Web Manga.
[X] Watch a Mystery anime adapted from a Novel/Light Novel: Series Does not include Visual Novel or Web Novel.
[X] Watch a Mystery anime adapted from another source not mentioned above: Series
Screenshots are suggested for the following 5 items
[X] Watch a Mystery anime with less than 50,000 members: Series
[X] Watch a Mystery anime that has between 50,000 and 100,000 members: Series
[X] Watch a Mystery anime with more than 100,000 members: Series
[X] Watch a Mystery anime rated 7.0 or higher: Series
[X] Watch a Mystery anime rated lower than 7.0: Series
[X] Watch a Mystery anime rated G or PG: Series Rating is "G - All Ages" or "PG - Children".
[X] Watch a Mystery anime rated R or R+: Series Rating is "R - 17+ (violence & profanity)" or "R+ - Mild Nudity".
[X] Watch a Mystery anime with a non-alphanumeric character in the main title: Series Non-alphanumeric characters refers to any character other than letters, numbers and blank spaces.
[X] Watch a Mystery anime with a non-Japanese main title: Series Must not contain any Japanese word in the main title listed on MAL. Any other language can be used: English, Korean, Chinese and so on. Made up words can't be used.
[X] Watch a Mystery anime where the first letter of the main title matches the first letter of your username: Series If your username starts with something other than a letter, you may skip that character up to your first letter.
[X] Watch a Mystery anime with a main title that begins with a letter between A and L: Series
[X] Watch a Mystery anime with a main title that begins with a letter between M and Z: Series
[X] Watch a Mystery anime where all of the main characters are male: Series
[X] Watch a Mystery anime where all of the main characters are female: Series
[X] Watch a Mystery anime with another genre, theme, or demographic not listed above: Series Must be listed on the anime page on MAL.
[X] Watch a Mystery anime that started airing in Winter: Series Began airing during the following months: January, February or March.
[X] Watch a Mystery anime that started airing in Spring: Series Began airing during the following months: April, May or June.
[X] Watch a Mystery anime that started airing in Summer: Series Began airing during the following months: July, August or September.
[X] Watch a Mystery anime that started airing in Fall: Series Began airing during the following months: October, November or December.
[X] Watch a Mystery anime that started airing the same season you joined MAL: Series Any year; Winter: Jan to Mar; Spring: Apr to Jun; Summer: Jul to Sep; Fall: Oct to Dec.
[X] Watch a Mystery anime that started airing in 1980 or before: Series
[X] Watch a Mystery anime that started airing between 1981 and 1989: Series
[X] Watch a Mystery anime that started airing between 1990 and 1999: Series
[X] Watch a Mystery anime that started airing between 2000 and 2009: Series
[X] Watch a Mystery anime that started airing between 2010 and 2019: Series
[X] Watch a Mystery anime that started airing in 2020 or later: Series
[X] Watch a Mystery anime with 10 episodes or less: Series
[X] Watch a Mystery anime with 20 episodes or more: Series
[X] Watch a Mystery anime with episodes that are 15 minutes or less each: Series Must have more than one episode.
[X] Watch a Mystery anime adapted from a Manga: Series Does not include 4-koma Manga or Web Manga.
[X] Watch a Mystery anime adapted from a Novel/Light Novel: Series Does not include Visual Novel or Web Novel.
[X] Watch a Mystery anime adapted from another source not mentioned above: Series
Screenshots are suggested for the following 5 items
[X] Watch a Mystery anime with less than 50,000 members: Series
[X] Watch a Mystery anime that has between 50,000 and 100,000 members: Series
[X] Watch a Mystery anime with more than 100,000 members: Series
[X] Watch a Mystery anime rated 7.0 or higher: Series
[X] Watch a Mystery anime rated lower than 7.0: Series
[X] Watch a Mystery anime rated G or PG: Series Rating is "G - All Ages" or "PG - Children".
[X] Watch a Mystery anime rated R or R+: Series Rating is "R - 17+ (violence & profanity)" or "R+ - Mild Nudity".
[X] Watch a Mystery anime with a non-alphanumeric character in the main title: Series Non-alphanumeric characters refers to any character other than letters, numbers and blank spaces.
[X] Watch a Mystery anime with a non-Japanese main title: Series Must not contain any Japanese word in the main title listed on MAL. Any other language can be used: English, Korean, Chinese and so on. Made up words can't be used.
[X] Watch a Mystery anime where the first letter of the main title matches the first letter of your username: Series If your username starts with something other than a letter, you may skip that character up to your first letter.
[X] Watch a Mystery anime with a main title that begins with a letter between A and L: Series
[X] Watch a Mystery anime with a main title that begins with a letter between M and Z: Series
[X] Watch a Mystery anime where all of the main characters are male: Series
[X] Watch a Mystery anime where all of the main characters are female: Series
[X] Watch a Mystery anime with another genre, theme, or demographic not listed above: Series Must be listed on the anime page on MAL.
[X] Watch a Mystery anime that started airing in Winter: Series Began airing during the following months: January, February or March.
[X] Watch a Mystery anime that started airing in Spring: Series Began airing during the following months: April, May or June.
[X] Watch a Mystery anime that started airing in Summer: Series Began airing during the following months: July, August or September.
[X] Watch a Mystery anime that started airing in Fall: Series Began airing during the following months: October, November or December.
[X] Watch a Mystery anime that started airing the same season you joined MAL: Series Any year; Winter: Jan to Mar; Spring: Apr to Jun; Summer: Jul to Sep; Fall: Oct to Dec.
[X] Watch a Mystery anime that started airing in 1980 or before: Series
[X] Watch a Mystery anime that started airing between 1981 and 1989: Series
[X] Watch a Mystery anime that started airing between 1990 and 1999: Series
[X] Watch a Mystery anime that started airing between 2000 and 2009: Series
[X] Watch a Mystery anime that started airing between 2010 and 2019: Series
[X] Watch a Mystery anime that started airing in 2020 or later: Series
[X] Watch a Mystery anime with 10 episodes or less: Series
[X] Watch a Mystery anime with 20 episodes or more: Series
[X] Watch a Mystery anime with episodes that are 15 minutes or less each: Series Must have more than one episode.
[X] Watch a Mystery anime adapted from a Manga: Series Does not include 4-koma Manga or Web Manga.
[X] Watch a Mystery anime adapted from a Novel/Light Novel: Series Does not include Visual Novel or Web Novel.
[X] Watch a Mystery anime adapted from another source not mentioned above: Series
Screenshots are suggested for the following 5 items
[X] Watch a Mystery anime with less than 50,000 members: Series
[X] Watch a Mystery anime that has between 50,000 and 100,000 members: Series
[X] Watch a Mystery anime with more than 100,000 members: Series
[X] Watch a Mystery anime rated 7.0 or higher: Series
[X] Watch a Mystery anime rated lower than 7.0: Series
[X] Watch a Mystery anime rated G or PG: Series Rating is "G - All Ages" or "PG - Children".
[X] Watch a Mystery anime rated R or R+: Series Rating is "R - 17+ (violence & profanity)" or "R+ - Mild Nudity".
[X] Watch a Mystery anime with a non-alphanumeric character in the main title: Series Non-alphanumeric characters refers to any character other than letters, numbers and blank spaces.
[X] Watch a Mystery anime with a non-Japanese main title: Series Must not contain any Japanese word in the main title listed on MAL. Any other language can be used: English, Korean, Chinese and so on. Made up words can't be used.
[X] Watch a Mystery anime where the first letter of the main title matches the first letter of your username: Series If your username starts with something other than a letter, you may skip that character up to your first letter.
[X] Watch a Mystery anime with a main title that begins with a letter between A and L: Series
[X] Watch a Mystery anime with a main title that begins with a letter between M and Z: Series
[X] Watch a Mystery anime where all of the main characters are male: Series
[X] Watch a Mystery anime where all of the main characters are female: Series
on 
𝚍𝚎𝚕𝚒𝚟𝚎𝚛𝚒𝚎𝚜