GVH-264 - My cousin grew into a total bombshell after all these years

The story follows a pathetic ronin student who finds himself living with his cousin until her entrance exams, only to discover she's grown into a chubby girl with massive breasts. He makes up silly excuses to bathe with her, eventually losing control and stripping her pajamas off at night. He messes with her while she's studying for oral sex, and they even have sex in her sailor uniform right next to her father's room. After she passes her exams, she visits him and gives him a handjob. It has a comedic tone where she becomes completely submissive during their time together, eventually initiating things herself. There's also the tension of having to stay quiet because her parents are home. My only complaints are that nothing happened in the bath and there was no full-nude play. The look and body type might be hit-or-miss, but it's my preference, so I rate it highly.