The Cast-Out Prince's Rise

Protagonist transmigrates into Finn Lennox, son of the King of the Southlands. At 7, he is sent to the Capital as a Hostage Prince. He feigns madness for thirteen years. Intending to return home to the Lennox Clan, he is met with cold betrayal. He leaves the Lennox Clan, embarking on a journey of counter-attacking and turning the tables on his enemies.