Toudou Haruhiko is an obese NEET who got summoned to a different world when he was about to get hit by a truck. Unfortunately, the summoning system malfunctioned due to exceeding the weight limit and he was sent back to his world with the summoner Princess Shella Stalion.... more>>

He retained some Lv.1 skills, but one skill's level got corrupted into Infinity. So he got a powerful version of the skill Judgement, embodied as the cute girl Infinity-chan.

She tells them that Shella can return to her homeworld if she can re-cast the summoning to open a portal - but that is conditioned on Haruhiko losing some weight. <<less