Yuta was dumped by his first girlfriend. He was so shocked that he couldn't recover from it and was stunned. His sister-in-law Airi, worried about him, made him an unexpected suggestion. "Don't keep worrying about it! Come on, rub my boobs and cheer up!" Yuta was taken aback by Airi's sudden braless big boobs, but Airi's eyes were so serious that it didn't look like she was joking at all...