That cutie is 707 from Mystic Messenger!
You have my interest, I will seek to learn more later. >:3He's one of my fav hacker boiz around, and my fav character from Mystic Messenger, a mobile visual novel, basically an otome game, but a ridiculously good and captivating one, with awesome characters - let it eat away your storage space and jump in the 11 days of plot, real-time chats, phone calls and texts with the derps that you can romance in the game. Recommend it wholeheartedly, since the chats are extremely natural, memeful, also deep af sometimes, aka very "contemporary"-feel and realistic
But I have marching band stuffs going on so researching will be delayed for now~