IN SO DEEP IT’S LOVE ALREADY

Because of a heartbreak in her past, Kirino decided to live more for her idol than for actual boys, but one day, transfer student Kametani-kun comes, who has a somewhat similar vibe to her idol! When Kametani-kun glares at the girls saying, “Don't even think about talking to me!” on the very first day of transferring to the school, Kirino gets intrigued by him and learns his secret and…?! (Source: K Manga) — Description from AniList community (anilist.co).