Kono Sankaku Love Kome wa Shiawase ni Naru Gime ga Aru.

An unprecedented romantic comedy centered around a delicate love triangle is about to unfold. As the new school year begins, Tenma Yashiro, an entirely ordinary high school boy, finds himself placed in the same classroom as the two most beautiful girls in the entire school: Reira Tsubaki and Rinka Kou. Despite their striking appearances, the two could not be more different. Reira radiates a cheerful and innocent charm, while Rinka maintains a cool, aloof demeanor that keeps everyone at arm's length. All Tenma wants is to keep his distance from these overwhelmingly captivating classmates and enjoy a quiet, peaceful school life. However, fate has other plans for him. One fateful day, he accidentally stumbles upon a forbidden secret belonging to the seemingly untouchable Rinka. This unexpected discovery shatters his hopes for an uneventful routine, setting off a chain of events that will drastically alter his everyday existence forever.