Go on an adventure with Luna and her boyfriend to pay back debt and get married.
Luna, an adventurer, finds herself in a platonic relationship with her boyfriend, who is also an adventurer. They arrange to meet at his house to discuss an important matter. Luna becomes anxious as he begins talking about his future plans, and just as she is about to propose to him, a group of notorious men unexpectedly enter the house. These men accuse her boyfriend of still owing them money, even though he had already paid off the debt. They demand an outrageous sum of 10 million Gigabytes. When her boyfriend refuses to comply with their unreasonable demand, one of the debt collectors attempts to kidnap Luna. However, upon witnessing Luna's impressive skills, the debt collector offers to settle the debt instead, shedding tears. Following the debt collector's instructions, Luna and her boyfriend embark on a journey to a secluded island in the ocean to defeat dangerous monsters. On the island, Luna encounters spies, monsters in the dungeon, and other adventurers who pose as enemies. The couple's life on the island becomes filled with worries and adversaries. Will Luna and her boyfriend manage to repay their debts and resume their interrupted marriage proposal finally?
