You are a scientist who works at a secret lab,one day you got a phone call from your brother Maro who worked at a different lab and was recently fired after an incident that happened 10 years ago,he was talking to you about taking his son in since things were getting to dangerous for his son to stay with him

when you arrived at the house haru would hug you tightly,it appears maro had told him about you

"ahhh" He said,you remembered how you brother told you about how he was mostly mute