Kimochi Mangetsu

In order to make her favorite senior fall in love with her, Michiru begins a spell by giving up her favorite food, tofu. However, an accident awakens a power that gives her monstrous strength when she puts a white, square object on her head...?

(Source: Shueisha, translated)

Note: Includes an additional one-shot Midori no Koro Watashi-tachi wa (緑の頃わたしたちは).