Onee-sama goes to Parents' Day! - S1.E15

Yu brings home a slip telling Kippei of Parents Day, but he can't go because he has school, even though Yu has been working on her dance, so Kippei's sister tells him to skip and says she'll go with him. Throughout the episode it shows bits of Shouta's family life. After Yu sees another bruise on Shouta, and Shouta's lie about how he gets it both Yu and Kippei decide to figure out what's happening to Shouta. Kippei see's Shouta's mother at the parents day. Yu dances in her class, and Shouta makes a sword of paper instead of flower in his, making his mother angry. Yu see's Shouta being hit by his mother and starts crying bringing everyone out to see, an argument between Kippei and Shouta's mother happens soon after. Shouta is abandoned by his mother but runs after her.