One day, Chikahara Zenichi saw "NTR: 1 Million" floating above his girlfriend Nishimiya Kokoro's head. NTR stands for Netorare, meaning to have one's partner stolen.

So, is that why she's so prone to NTR?! Indeed, Kokoro is a 'childhood friend,' 'student council president,' 'tennis club member,' has 'long black hair,' and is a 'pure and innocent type.' W-wait, isn't that a jackpot...!? Damn it! I absolutely won't allow that! I'd rather be dumped than see Kokoro stolen away! Now that it's come to this, I absolutely have to stop it!!

Zenichi, now filled with determination, scrambles to protect her from the men swarming around her.

※This work is also published on Kakuyomu.