Yandere Meruko-chan wa Senpai ga Osuki

I like you senpai ♡
I don't need anything else...

Meru used to think love was a trifling matter, but then she met a petite "senpai" with a strong sense of justice and fell in love. She's very affectionate for senpai, but her love may be going a little bit overboard.

(Source: Ichijinsha, translated)