From Renta:

Chiharu isn't what you'd expect of a top-class host. Though he certainly dazzles his customers while on the clock, he actually spends most of his day raising a child!
After his older sister's tragic death in an accident, Chiharu is determined to be the best guardian possible for his young nephew, Akito. In a stroke of bad luck, though, Chiharu finds himself injured, temporarily out of work, and rained out of his apartment!
Thankfully, Chiharu and Akito are offered shelter by a kind couple at a temple... whose son just happens to be someone from Chiharu's past!

What will happen when they're forced to suddenly live together...!?