お見合いの相手は学校1の美少女。真面目そうな彼女は家では甘えたがりな女の子でした;

The main character, Hirase Yuzuki, is a high school student who has to go on an arranged marriage to take over the family business when his older brother runs away to study abroad. 

He doesn’t want to accept the arranged marriage that his parents have set up for him, but then, Kashiwagi Yukina, His classmate and the school’s top beauty, appears.

[I fell in love with you at first sight! Please marry me!]

[…Yes?]

…Huh? It’s a completely different impression from the one at school…

And so, begins my life together with Yukina. 

I wonder what’s going to happen…