Innocent boy, who actually loves someone, but didnt confessed yet. After he didnt confess, more girls are gathering and somehow it ends into a harem. Both mangas have different kind of girls with different characters, tsundere etc. A funny love comedy , where you can feel, that his love is changing towards another girl instead of the "original" love. Both of them are kinda "fake" loves, since the maincharacter is "going out" with several girls ( well in maga tsuki he is kinda forced to stay with the girl with the soul ).
Both follow a boy who has a crush on a girl but due to uncontrollable circumstances is forced to "be with" a different girl. The girl he has a crush on also has a crush on him but neither know. They both eventually become harem with a huge focus on comedy. Main character is oblivious and the girls have similar personality types to a girl from the other series.
both main characters are connected in some way because of a magical mirror in (kagam no kuni no harisugawai) and a sealed mirror of a godness in (Maga-tsuki). Both are great mangas to read for a quick laugh :)
Both series contains a story involving mirror from the initial chapters. From there, strange occurrences happen throughout the manga.
Both series' main protagonist also has feelings for one of the main girls of the series but is often interrupted as result of a third party. Later on, a love triangle develops.
Both series has comedy, drama, and supernatural elements as well as romance.
Both have similar vibe and their both include a Harem Plan
Were the Male Characters get a lot of girls to like him but the truth is he only like 1 of them but later he get to like to other girls but he still has feeling for that one girl.
Romance and Goddesses/Demons girls. Both have male protagonists who lived their daily lives until something abruptly occurred. Have number of jokes and ecchi scenes and pretty much a harem is gonna happen in some point. (same as Tsuki Tsuki)
Jitsu wa Watashi wa and Maga-Tsuki are rom-com/slice of life series that focuses on the daily misadventures of the male protagonist. The male protagonists are also similar with their personality and is always eager to help the people they meet. This brings the attraction of the girls towards them as they see them as someone they can trust. Both series focuses on many generic everyday life situations. Maga-Tsuki is also known for some fan service with more comedic romance while Jitsu wa Watashi wa portrays slice of life more often with its daily storytelling.
In a nutshell, both of these manga share quite a lot of similarities especially in the romantic comedy department:
*Both manga series has a main male protagonist with several female characters interested in him in different ways all the while leaving with him.
*Both manga series contains drama, comedy, romance, and also a little emotions in a few chapters
*Both manga series also contain a little fan-service such as the typical onsen chapters
Both series consists of a protagonist that are lead into a harem situation due to supernatural events that are both connected by a kiss, if there is no kiss, then death would occur (In one manga, this only occurs to the protagonist). In addition, in both harems, there is a heorine with a little sister that is in love with their older sister.
In both, the male protagonist becomes binded with the female protagonist. Despite initial concerns, the two work/live together which oftentimes results in another female character falling in love with the male protagonist.