第 4 集: 大吉找到宗一的遺囑，並將凛送入學校後聯繫真佐子
2011年7月29日 播出
At school, Rin makes friends with a boy named Kouki Kitani, with Daikichi later meeting his single mother, Yukari. Daikichi's workmates hold a farewell party for him, which he brings Rin along to. After enrolling Rin into elementary school, Daikichi looks through her health record and manages to find Souichi's will, containing Masako's contact details. After buying Rin a desk, Daikichi decides to call Masako. (Source: Wikipedia)