My Stepmom's Daughter Is My Ex (2022)

S1E3 My Ex Has a Confession to Make

Under the cover of night at the Irido home, Yume unexpectedly discovers she has Mizuto's boxers in her possession. If Mizuto learns of this, she risks the embarrassment of revealing her status as the younger sibling. To dodge this dilemma, Yume plans to wait until Mizuto is asleep to quietly return his underwear to the laundry. However, as she tiptoes through the hallway, she unexpectedly encounters a stunned Mizuto, who stands there, shocked, holding Yume's own bra in his hand.