Kimi no Negai ga Kanau Made

Story

For his high school debut, Minto Shishidou pretended to be an outgoing playboy, spinning lies about the girlfriends he goes through. This corner he backed himself into weighs heavily on his mind when he joins a school trip, and he’s determined to use the occasion to get a girlfriend for real. But then an unimaginable incident strikes him and his classmates, setting the stage for a locked-room love comedy centered around the wishes of these boys and girls.

Synopsis via AniList (English).