If you're looking for anime similar to Ryuu & Dr. Series (Light Novel), you might like these titles.
Sayama is a gloomy guy that wears a mask to school every day. What will happen when bad boy Saikawa attempts to rip it off?!
The story begins with Masaki Michishita, an ordinary prep school student who is rushing to the bathroom in a park one day. Despite his rush, he spots Takakazu Abe, an exceedingly handsome auto mechanic sitting on a bench. The two exchange looks, and after Abe utters "Yaranai ka" (Shall we do it?), the two begin their encounter.
A Yakuza boss really wants this "Mad Dog" fighter he found to work for him, but the "Mad Dog" isn't too keen on the idea, even though he owes a debt. After being injured and refusing to go with the boss, the "Mad Dog" winds up staying with the doctor for a few days. Will the "Mad Dog" give in to the boss to pay off his debt?
Thanks to the incredible last words of his grandfather, young and adorable Makoto's virginity is the target of every teacher who wants to be principal of his school! Will fleeing to the mountains to recruit his childhood friend Kintaro be the answer to his prayers... and wildest fantasies?
The fifth season of Fudanshi Shoukan: Isekai de Shinjuu ni Hameraremashita Mini Anime.
The fourth season of Fudanshi Shoukan: Isekai de Shinjuu ni Hameraremashita Mini Anime.
The sixth season of Fudanshi Shoukan: Isekai de Shinjuu ni Hameraremashita Mini Anime.
The second season of Fudanshi Shoukan: Isekai de Shinjuu ni Hameraremashita Mini Anime.
The third season of Fudanshi Shoukan: Isekai de Shinjuu ni Hameraremashita Mini Anime.