An ordinary-looking female college student, known online by the handle Jugemu Jugemu Gokō no Komugiko-kun #0926, is a hardcore gaming addict and the world-ranked S-class number one player in the mech combat game Armored Core VIII. She is also a vicious trash-talker who relentlessly griefs and taunts other players in online matches. One day, she pushes her harassment too far against a player she assumes is just another anonymous newb. That player, Backflip Meme Baby #1121, is not an ordinary human but a hulking, hellish lizard man, a creature who always follows through on his words. Using unexplained means, he traces her IP address, shows up at her apartment door, and forces his way inside to exact revenge.

What begins as a dubiously consensual physical confrontation quickly mutates into something else entirely. The female protagonist, whose defining trait is her pathological need to win at everything, refuses to accept defeat even in this situation. She reframes the encounter as a game, a competition she can dominate, and her hyper-competitive spirit transforms the assault into a psychosexual power struggle between two top-tier players. Over the course of an extended day-long battle, the two trade verbal abuse and physical escalation, with the lizard man's raw experience and monstrous stamina pitted against the girl's innate adaptability and iron will. Their conflict blurs the line between hate-fucking and genuine attraction, and by the end, the girl proposes a new goal: climb to the number one ranking on the adult video site where their encounter was recorded.

The story is set entirely within the girl's mundane apartment, contrasting the ordinary domestic setting with the absurd, monster-fucking premise. The narrative is driven by meta humor, fourth-wall breaks, and a cartoonishly exaggerated tone. Both main characters remain unnamed in the text, known only by their online handles. The girl is depicted as slobbish, crass, and physically ordinary with a soft tummy, a deliberate departure from idealized anime body types. The lizard man is a towering demonic figure whose anatomy is played for both shock value and comedic effect. The series continues in a sequel, Lv2, which moves the action to an amusement park date and outdoor encounter, and a side story, Lv2.5, which shifts focus to other top-ranked content creators.