Yuu Tōsaka, the adopted son of the Tōsaka family, later went to the Clock Tower for "advanced training." His original plan was for him to pursue a career as a magus after graduation... until he stumbled upon a game disc. After opening it, he entered the game's world and encountered Tiamat right at the start. [Quest: Fight alongside Tiamat] "Wait, why aren't you asking me to save Humanity?!" Yuu Tōsaka quickly discovered his blind spot, but he ultimately successfully completed the system quest and spent a wonderful time with Tiamat. ...After that, he journeyed through several different game arcs. In Britain, he was King Arthur's childhood sweetheart. During the Fourth Holy Grail War, he found a girl who adored him... her name was Sajo Aika. After finally completing the game, Yuu Tōsaka was about to put the disc away for safekeeping when, one sunny afternoon, the Heroic Spirits he had captured in the past arrived. The Knight King, Morgan the Fairy, Tiamat, the Root Princess... Looking at the unique Heroic Spirits before him, Tōsaka Yuu began to sweat profusely. "The Heroic Spirit I captured in the game... actually became real?!"

【Exciting】【Punch to the Flesh】【System】【The Protagonist is Invincible】【Revenge if you have a grudge, fight if you are unhappy! 】

After traveling to a classroom in the Teaching Academy, he looked at the centenary girl senior who was glaring at him on the podium, and the system's voice rang out.

What? Just completing the tasks assigned by the system will earn you rewards?

With a super strong body, conceptual magical skills, and devil fruit, the journey to becoming stronger against all odds begins.

Falushan: I accepted this person as my disciple regardless of past grudges, but the result was... this traitor!

Yun Jin: As his fiancée, I hope he won’t be unfaithful again!

Ying: This man is the strongest opponent I have ever seen in my life, but... our child will be even stronger.

Ying: It's all because of that guy. My journey has become even more difficult...

Ye Xuan stood in the void, his arms outstretched, and invincible power burst out from his body.

With one punch, the mountains and rivers are shattered!

There’s nothing I can do, I’m invincible, I’m just so willful.

Waking up on the operating table. Durin had originally thought that saving humanity was all he needed. But then—Fuyuki's 'AI', BB-chan, who's trying to conquer the world, invades Chaldea, wanders the Far East, sharpening her knife to find the murderous woman I killed, and the Root Girl, who comes looking for Saber, is completely unreasonable—and then there's a silver-haired Leo woman who wants me to be her right-hand man and acting director of Chaldea. Hmm... This is probably a world where even messing around with Gudafu & Gudako won't be enough to survive!