Tsuiho Oji No Anyaku Muso Makyo Ni Suterareta Oji Ha Eiyu O Tachi No Chikara Wo Saikyo to Naru (GA Bunko) [Light Novel]

[Machine Translation] Rion is a boy who has survived for ten years in a "magical land" infested with demons. He is a former prince who was banished to the magical lands as an "abomination" without a coat of arms. Rion had decided never to be a part of the royal family again, but when he learns of the assassination attempt on his sister, Princess Celestia, he finally decides to return to the royal capital. Rion, who hides his true identity and reunites with his sister, acts as her bodyguard and a mysterious swordsman to eliminate the threats to the princess one after another. When an unprecedented crisis involving the entire country hits the princess, Rion unleashes his hidden true power - the power of the Heroic King that resides in his body! A fantasy of dark and unrelenting warriors by the strongest prince who inherited the power of legendary kings!

魔物はびこる『魔境』で十年もの間生き延びてきた少年リオン。その正体は“紋章”を持たぬ忌み子として魔境に追放された元王子であった。二度と王家に関わらぬと決めていたリオンだったが、妹である王女セレスティアが暗殺未遂にあったと知り、ついに王都への帰還を決意する。正体を隠して妹と再会したリオンは、ある時は護衛、またある時は謎の剣士として、王女に迫る脅威を次々と排除していく。そして国をも巻き込む未曾有の危機が王女を襲う時、リオンは秘めていた真の力―その身に宿る英雄王の力を解放する!伝説の王たちの力を継承した最強王子による暗躍無双ファンタジー!