Game Chishiki de Saikyou ni Natta Mob Heishi wa, Shin no Jitsuryoku wo Kakushitai

Silva discovers that he has been reincarnated as a minor soldier from the game he loved in his previous life, now serving as a gate guard. He relies on his game knowledge to survive in a dangerous world, while keeping his true strength hidden to avoid drawing attention and making his life more complicated. But Silva effortlessly defeats a giant monster that even the hero struggles to overcome—and does so in front of his favorite heroine. Word of his strength begins to spread, threatening his effort to stay unnoticed. He is determined to do anything for the character he admires.