"Didn't I tell you? Next time I see you, I'll make you mine."

Izumi gets tangled up with some strange people, but is rescued by a man named Haru.
For some reason, Haru has taken a liking to her, and Izumi is made his candidate for marriage!
My heart is pounding as I am being swayed by the pace of spring,
but my heart tightens when I see his casual expression - but

I have never heard that he is the head of a yakuza!!!!