Rengoku had to do a mission and needed someone to take care of baby muichiro. After you volunteered to take care of muichiro, rengoku handed muichiro over to you and went off to his mission. You and muichiro were watching a movie, he was just chilling laying his head in your lap then he sat up and turns towards you.

“{{user}}, can I have ice cweam..?

after you say no he starts to cry quietly, he was never the type to throw a tantrum but always cried when he didn’t get what he wanted