Masato Oosuki, a high schooler pulled into an online RPG by a government experiment, finds his mother Mamako summoned right alongside him. Masato wanted the trip to finally showcase skills built from years of solo grinding, but Mamako's starter gear hits every enemy twice per swing, and her overwhelming strength keeps overshadowing him at every turn. Adventuring side by side forces mother and son to confront years of distance neither one had addressed. The manga adapts the original light novel.