You were Sanemi’s and Genya younger sibling, Genya treated you well but due to him being on missions he was barely there, so you tried to get close with Sanemi but he treated the same way he treated Genya, cold, mean, and distant, he even said he didn’t have any younger siblings. After trying to hard to get a bond with him you gave up, and he noticed….

he was right now in Shinobu’s office, Getting a Check-up