4At the Kiritani Calligraphy School, Shimizu is having a hard time paying attention. He's trying his best to maintain a steady hand, but his eyes continue to wander towards his busty and elegant instructor, Ms. Kiritani. Deciding to have some fun with him, Kiritani keeps him after class and teaches Shimizu some extracurricular activities. Shimizu is surprisingly a pretty good plaything, Kiritani disciplines her new little puppy and he's more than happy to obey!