Guys, This is tragic LN where Mc is transported into a world, born as slave boy, where he later discovers that it is a game world and the FL he is intrested is treated as villain. There is actually a female player who has walkthrough jotted down in her notebook pulling strings of prince. MC has 1 blue eye(representing himself) 1 red eye (representing original owner of the body) but is looked down by society as curse. But he can actually use power of ice and fire. He Serves as servant for the FL's house which uses wind magic. MC's best fried who is brother of FL is wrongfully executed by king. And FL is sent as slave. But Mc manages to become underworld mafia king, then a baron and gets FL back. It is hinted that Mc might be actually kings discarded eldest son. I apologise for difficult to read English. I'll be very grateful if you could help me brothers.