Suiyou Kyoudai

Tooko, a 26-year-old woman, has gained a new younger brother, Natsu, who is 13 years her junior, following her mother's remarriage. In an effort to carve out time for themselves, their parents have requested that they spend one day a week together, and Natsu has begun to visit Tooko's home on Wednesdays. Despite their sudden change in relationship, they have started to open up to each other as they share meals and activities they've prepared together. As they spend their Wednesdays cooking and creating, they are gradually developing a deeper bond, despite the initial awkwardness of their newfound sibling relationship.