Summary:

Wakamura Sachie recently lost her mother and the grandfather she knows nothing about, has suddenly shown up to take care of her. He is not just a Grandpa though. He is also the head of a yakuza gang. This causes problems to Sachie but she tries to live a normal life despite it.

Her grandfather assigns Rakuto, a boy who Sachie starts to fall in love with, to be her bodyguard but Rakuto won't ever be able to show his feelings for her because she's the granddaughter of his boss.

Will Sachie be able to overcome the obstacles and find a way to fit into her new family and perhaps get the chance to experience first love?

(Written by Hill)