Chocolate Cosmos

Fifteen-year old Sayuki Sakurai is a girly-girl at heart, but her sharp tongue and equally sharp gaze send most boys running! Determined to nab herself a hot summer romance during the holidays, Sayuki visits the beach and meets a cute guy who cheers her up after an awkward situation. She returns to school with confidence and as luck would have it... that cute guy is her Home Economics teacher! Dodging what love and life have in store, Sayuki is in for one roller coaster of a school year...

(Source: Viz Media)

Included one-shot:
Volume 2: Yes or Kiss