ウエディングラプソディー

Makoto Okawa has turned 17 years old and he is ordered by his father to find three ideal marriage partners selected by a supercomputer. All of the girls study at the same school, so Makoto starts attending the same school from now on. He's ordered not to reveal and fight for girls attention like a commoner. Okawa family legend says that marriage in 17 brings luck, so there's no time to waste!

[From vndbreview]