Gimai Seikatsu manga, also known in English as Days with My Stepsister, is a story about Yuuta Asamura, who gains a stepsister named Saki Ayase after his dad remarries. Saki is the most popular girl at school. They promise to keep their relationship as stepsiblings and not get too close. Saki has always taken care of her family alone, so she struggles to rely on others. Yuuta doesn’t know how to act around her. But as they spend more time together, they start to understand each other better. Their relationship grows as they become more familiar with each other. Maybe they’ll even fall in love eventually.