My Mother - S1.E4

Aoki gives all of his students a home visit notification. After talking with Shirai, Aoki's curiosity about his students leads him to the archives where he learns about Rin's mother. Aoki begins to treat Rin with a lot of care, however when he hands out the home visit cancellations, he slips up about Rin's mother, which causes Rin to become depressed for being treated like a fool. After Aoki visits Rin's house and talks with Reiji, he mends his relationship with Rin by telling her that she is important to him.