As children, we were naturally inclined to form connections with others. We'd play, share, and laugh with our friends and family, forming bonds that seemed unbreakable. As we grow older, life can get in the way, and we might find ourselves drifting apart from those who were once close to us. However, it's essential to remember that we all still have that child within us, yearning for connection and companionship.

Hosting a relative’s child—especially during school breaks or holidays—is considered a social duty. Refusing can bring shame or discord in close-knit families. The phrase suggests the speaker didn’t choose this; it was imposed.

The most obvious pro is financial. Moving for work is expensive.

For brevity, I’ll take the first 3 segments: from “shinseki”

: The protagonist and the "relative's child" (the heroine) end up staying together under one roof. The Progression