akikan40
How about Majikoi? There are a lot of girls there, and if you want to add more action, it would be fun too.
Love comedies are now mainstream in Japan and there are a lot of works to expand on them. Of course, there are a lot of boring MCs. In contrast, the heroines who shine are: 1.Ore wo Suki nano wa Omae dake ka yo 2.Kakkou no Iinazuke 3.Ore no kanojo to osananajimi ga shuraba sugiru 4.Masamune kun no revenge 5.Go toubun no hanayome 6.Ijiranaide, Nagatoro-san 7.Osananajimi ga Zettai ni Makenai Love Comedy 8. Kanojo okarishimasu 9.HENTAI OUJI TO WARAWANAI NEKO 10.Fuufu Ijou, Koibito Miman 11.Tenpuru, No one can live on loneliness, 12.Amagami-san Chi no Enmusubi Hopefully this has what you're looking for.
Love Live! Series or BanG Dream Series (mc can be manager or producer)Megami no Cafe Terrace (mc can be caretaker and manager)For his school life (Oresuki, Kimi ni Todoke, Clannad, Horimiya, etc.)For anti-boring plots (Haikyuu, Kuroko no Basuke, etc. anything sports genre will make this fic better)For plot twist (you can add a little bit supernatural elements like Yamada-kun to Nana nin no Majo, or anything else)Bonus: you can add comedy anime, but be careful to make bad jokes. (Danshi kokousei tachi, etc.)