Ep. 4: Kou and Nino’s date involves a river rescue and Stella’s arrival
Aired on April 26, 2010

Kou and Nino enjoy their first date, walking three hours to the river mouth. Kou attempts to prevent boredom and retrieves Nino’s grass ship from a signpost by entering the water. Upon returning to the bridge, residents meet Stella, an English orphanage girl cared for by Sister while she contacts her home country. Stella proves to be a skilled fighter and defeats Kou in combat. Later, Kou and Sister visit a farm run by Maria, a woman known for insulting others. Sister remains unfazed by her remarks until she calls him boring, causing him to collapse.
Episodes
- Ep. 1 · Kou falls into the river and accepts Nino's love to repay his debt
- Ep. 2 · Kou struggles to converse with Nino and faces awkward introductions to Arakawa residents.
- Ep. 3 · Hoshi forces Kou to confess about Nino, leading to a date invitation and a river visit.
- Ep. 4 · Kou and Nino’s date involves a river rescue and Stella’s arrival
- Ep. 5 · Kou retrieves vegetables from clumsy P-ko after returning injured Sister
- Ep. 6 · Kou wins the musical duel and accepts a teaching role for the Arakawa residents
- Ep. 7 · Kou teaches science to Nino and the Metal Brothers while managing Stella and P-ko's romantic developments.
- Ep. 8 · Kou’s employees visit, leading to a fake company charade and Nino’s surprising kiss.