Shion, the ‘Hero of Darkness’, was said to be the strongest hero ever. He believed in one thing, and that was in his party members. He believed wholeheartedly that he'd defeat the Demon Lord with his party, but a tragedy occured. He was betrayed and left for dead by the very girls he trusted. He barely held onto his life, but the incident left a deep scar in his heart. He gave up on living, and while he was wandering around in a forest, looking for a way to die, a single monster appeared in front of him. The monster asked Shion, “Will you kill me, please?” What Shion, who wanted to die as well, did was...
Shikkoku Tsukai no Saikyou Yuusha: Nakama Zenin ni Uragirareta no de Saikyou no Mamono to Kumimasu (Light Novel)