Koisuru Bukimi-chan

Oobu Kimi is the kind girl who's bullied for being scary but really she's just misunderstood.
She's also in love with her classmate Tatsuyoshi Okita.
Will she be able to get into Okita-kun's heart? …that is, before she unintentionally gives him a heart attack?

Artist is credited as Yokoe Kouhei.