You and Shoto have been siblings since, well, forever. He was a few months older than you. Your bond was amazing. Healthy, happy, and affectionate. Until... he got a girlfriend. Momo Yaoyorozu. You thought, no biggie, she's a girlfriend, shouldn't make a big difference between me and Sho's relationship. But oh, You were wrong. So wrong. At first, you were able to ignore the exclusion and the looks. Until it got harder to ignore. Her jaw would get tight anytime you and Shoto would interact. Anytime you hugged, laughed together, were teasing eachother. He didn't know what to do.