This trophy has a bit of luck involved, but will come naturally with enough playtime. There are times when a girl will refuse gifts, even ones she likes. The best chance to get a girl to accept a gift is if her Satisfaction is high. Satisfaction is raised by eating Indifferent/Liked/Loved foods/drinks in Girl Mode, gifting Indifferent/Liked/Loved items in Owner mode, and doing activities. Before gifting an item, there will be hearts displayed at the bottom of the screen. At 4/4 hearts, that is the best chance for the girl to accept the gift. Repeat 10 times.