Sakurano Yuki, the strongest underground fighter, also known as Princess Burst Yuki, is a hard worker who supports her family (or people like her) from the orphanage where she grew up with her fight money. She then receives a scout from the industry legend King. For the sake of her family (or people like her) from the orphanage, and above all to become the strongest herself, Yuki faces a match with King. But... You've tricked me. The match with King was essentially a show where the loser would be roughly assaulted by King in front of a large crowd as a penalty. Yuki's face contorted in frustration as she sucked his penis, and to top it all off, she lost her virginity in full view of everyone. Furthermore, Yuki is stunned when King reveals his true purpose. Underground fighting where there are no rules and anything goes. Due to the lewd penalties imposed on the loser, Princess Burst Yuuki's mature body is stained white in front of the huge crowd...