Tsuma wo Dousoukai ni Ikasetara

This is an anime adaptation of the manga by Shirono Mahiro.

One day, Yuri goes to a former student meeting. Among the classmates she meets after several years is her ex-boyfriend, Tatsuhiko. During the meeting, Tatsuhiko drinks a lot of alcohol which is of great concern to Yuri. As a result, when he goes to the toilet to vomit, Yuri decides to accompany him. However, when they enter the toilet, Tatsuhiko closes the door and begins to pet Yuri.