Yuusuke is admired by Noelle but does not return her affection initially.
He too is overlooked by the girl he has a crush on, Natsumi.
He is passive and can do little when Noelle and her monster-like family move into his lonely house.
He tries to keep quiet about their residence when he is not in the house and tries to keep things from turning chaotic within the house.
At first he didn't agree with being Noelle's husband but in the end, he did care and love Noelle very much.

(Source: Wikipedia)