Summer vacation! Seiji, Guri, Akane and Yuzu have invited Akua to go with them to the beach. Akane tries to get Akua to go swimming with her in attempt to get closer to Seiji's little sister, but Akua gives her the cold shoulder. Pouting at her brother and his harem Akua goes to swim by herself but a dark shadow looms beneath her. Meanwhile, summer also means tests of courage! Guri suddenly invites Seiji, Akane, and Yuzu to the school after dark for a test of courage but her real motives are to pair another young couple who have asked for her help. Seiji thinks something isn't quite right about the pair though...
Let's aim to be a couple 
together in Heaven too, okay?
Lass uns auch ein hübsches
Pärchen im Himmel sein.
Seamos una pareja también en el cielo.
Seamos pareja también en el cielo.
Essayons de devenir un couple heureux
même au paradis, d’accord ?
Puntiamo anche noi a diventare una coppia
che sarà unita persino in Paradiso, ok?
Vamos tentar ser 
um casal no Céu também, tá?
Давай мы с тобой тоже будем
жить счастливо даже после смерти!