Transmigrating into the Marvel universe and becoming a temporary handyman at S.H.I.E.L.D., Leo was initially filled with despair. A single snap from the Purple Potato Demon could wipe out half of all life in the universe—who could withstand that? Fortunately, he was connected to the Ever-Changing System, which was refreshed weekly. He started with the Saitama System, allowing him to grow stronger through Saitama's training methods. The Red Name System granted Justice Points for a lottery upon killing or capturing red-named characters. The Undercover System allowed him to gain Crime Points to purchase treasure chests by actively joining Hydra. There were also Crime-Solving Systems, Exorcism Systems, Tree-Planting Systems, Dream Systems, Treasure Hunting Systems, Witch-Hunting Systems… Before he knew it, Leo had become the head of S.H.I.E.L.D., granted royal privileges to act first and report later.