Amasugite Zurui Kimi no Dekiai.

"You look so sweet, I could eat you up." When Chiko returns to her classroom to pick up the notebook she left behind, she notices a sweet smell. Following the scent to a seemingly empty room, she comes across the handsome, but aloof Mikoto Yukino, asleep. When he wakes up and catches her staring, Chiko finds herself on the receiving end of some very affectionate advances, and becomes completely overwhelmed, yielding to his rhythm. As Chiko and the chocolatey-sweet Mikoto continue meeting at this new secret spot of theirs, a cavity-inducing story of high school love slowly begins to unwrap! (Source: Manga Plaza)