Doubles teams are reassigned when a new member joins the badminton team, and former singles player Saeki Sota is assigned to play doubles with his brother Toya. Toya is excited to play doubles with his brother, but Sota's feelings on the change are complicated, and a fight between the two threatens to dissolve their doubles team entirely. Meanwhile, Toya finds himself in a bind at work, too...
You're an only child! 
You don't know what it's like!
!أنت فتى وحيد! لا تعلم ماهية هذاالشعور
Du bist ein Einzelkind!
Du hast doch keine Ahnung!
-¡Tú eres hijo único y no lo comprendes!
-Pues claro que no.
-¡Tú eres hijo único y no lo comprendes!
-Pues claro que no.
T’en sais rien, tu es fils unique !
Tu sei figlio unico, non lo sai com'è!
Você é filho único, não sabe como é!