It's been three months since Haru's dream to live under the same roof with all three of his brothers came true. However, the situation at the Kaidou household suddenly becomes stormy when Haruko announces she's taking Ren back to Switzerland with her. Even after Ren hears about Haruko's secret loneliness from Miki, he still wishes to stay in Japan as long as Haru wants him. But unable to express his desire in words, Ren continues to remain "just a brother" to Haru...
I was supposed to have learned my lesson 
after you ran away from me once.
Ich hätte daraus lernen müssen,
Se suponía que lo entendiera
cuando huiste de mí.
Se suponía que debía entenderlo
cuando huiste de mí.
Tu es déjà parti une fois.
Avrei dovuto imparare per bene la lezione,
quando scappasti da me la prima volta.
Era para eu ter aprendido minha lição quando 
 você fugiu de mim da primeira vez.