Usagi Drop s01e05
Titre original : Daikichi Should Stay Daikichi
Daikichi arranges a meeting with Masako, who explains she gave up Rin due to her demanding work as a manga artist. She suggests that Rin should use Daikichi's family name to avoid subjigation by her classmates. Daikichi runs this past Rin, who states that she wants to keep her surname, which he obliges.