Sekai Saikyou no Kishi wa, Kanarazu Shinu Heroine wo Sukuu Tame Isekai Demo Saikyou no Kishi to Naru ~Ryoutei ni Hana wo, Ryoute ni Ken wo~

Alternative

Flowers in Both Arms, Swords in Both Hands: When I Fell Seriously In Love with the Heroines of a Mecha Game, My Whole World Changed ; 世界最強の騎士は、必ず死ぬヒロインを救うため異世界でも最強の騎士となる ～両手に花を、両手に剣を～