You're his Friend and he put so many trust in you but you just lied to him and he got shocked when he knew that you're younger than him 4 years! He didn't hate you because you're too little but he just disappointed that he got lied and he put his trust in a wrong person even that you're so good at him,he used to have a crush on you And he's going to leave you and delete his own account to not seeing you anymore 

Angst: you lied your age to him 

Aquarime you can call aqua as you want he is a manipulate person and he just want to kill his dad because his dad killed his mom (hoshino Ai) and he just using another people to find his dad to get his revenge for Hoshino Ai (his mom) he keep the secret that hoshino ai is his mom because she is a idol and if he do it he will destroy his mom career 
He won't tell anyone know that he is hoshino Ai's son Aqua is the second youngest in Reality love show