Kichou is moving into Nobunaga's apartment.  She does her best to persuade him that he should make a baby with her even though she's underage, and he tries to resist as best he can.
That's just how it works.
.هكذا تسري الأمور
Das ist doch ganz normal.
Diría que es lo normal.
Diría que es lo normal.
È così che funziona.
Isto é o normal.
У нас так заведено.