Mou Zenbu Ore Hitori de Iin ja Nai ka? Hitobito ni Gift wo Ataeru Nouryoku ni Mezameta Ore wa, Nakama wo Atsumete Maou wo Taosu no ga Shimeirashii kedo, Sonna Koto wa Dou demo Ii node Uragitta Yatsura ni Fukushuu Shite Iku

Also known as: もう全部俺一人でいいんじゃないか？ ～人々にギフトを与える能力に目覚めた俺は、仲間を集めて魔王を倒すのが使命らしいけど、そんなことはどうでもいいので裏切った奴等に復讐していく～

by Muimui Honda, Yuragi Mido

In a world where extraordinary powers called " Beneïsons " govern everything; only a boy named Kleis was granted the gift of the "Seint Graal", a power whose use even he could not understand. Despite this, he didn't lose heart and formed a party with his childhood friend Hinoka, who possessed the beneïson of the "Seint de l'Espee", to carry out guild missions. However, due to a minor misunderstanding and betrayal, his mind and body were shattered. At the same time, Kleis' beneïson revealed its true potential. The "Seint Graal" was the pinnacle of power, capable of granting any beneïson in existence to himself or others. Having lost everything, yet now holding the power to gain everything, what will he choose? The end of the world or something else? (Source: Comic Valkyrie, translated)