Nina became Yusaku's new mother due to her father's remarriage. - Yusaku quickly becomes attracted to the kind and sexy Niina. - I want to somehow shorten the distance between me and Niina. - Then comes the good news that her father is leaving for a three-day company trip. - I get to be alone with Nina, who I've always loved... - I'd like to use this opportunity to build a close relationship with him all at once, but I can't think of any concrete ways to do it, so I'm having trouble...