A mediocre story, typical high-school setting, unnecessarily convoluted magic system, and lots and lots of fanservice. Trinity Seven would have been utterly average and forgettable if it wasn't for its characters.
The MC is, for once, not as dense as a brick, which already puts him ahead of majority of other harem leads. Arata is powerful and competent, so he doesn't have to be protected by the girls all the time. He's also unapologetically perverted, and it's quite refreshing to see him handle the inevitable ecchi situations with humor and honesty instead of stuttered apologies.
Most of the girls are rather likeable as well, from the prudish
and easily-embarrassed Lilith (a great target for Arata's teasing) to the mischievous and confident Levi, who developed a certain camaraderie with the MC and even goes along with his perverted jokes. Their interactions with Arata and each other are usually quite entertaining. Violent tsundere tendencies, while present in one or two characters, are thankfully toned down.
TL;DR Trinity Seven is an otherwise average harem carried by an awesome male lead and charming female characters.
* Your list is public by default.
English: Trinity Seven
Status: Finished Airing
Aired: Oct 8, 2014 to Dec 24, 2014
Premiered: Fall 2014
Broadcast: Wednesdays at 01:40 (JST)
Producers: TV Tokyo, Sotsu, Kadokawa Shoten, AT-X, Studio Mausu, Avex Pictures, Q-Tec, Docomo Anime Store, DeNA
Licensors: Sentai Filmworks
Studios: Seven Arcs Pictures
Duration: 24 min. per ep.
Rating: PG-13 - Teens 13 or older
Score: 7.071 (scored by 437969437,969 users)
1 indicates a weighted score.
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.