Koi no Kamiato

Back in high school, Iori and Mayumi were close, and they always used to eat lunch together. Years later, Mayumi's a master chef and expert in the culinary arts. During a signing for his new cookbook, Iori lines up quietly, not expecting Mayumi to remember him. So when he finds out that Mayumi hasn't forgotten him at all, his heart beats so fast from excitement, he literally blacks out! When he comes to, he sees Mayumi, who invites him over for dinner! However, things don't go as planned during the night. After having gotten quite drunk, Iori's bad habit shows its ugly teeth!

(Source: MangaPlaza)