After the newly graduated college student finished making the game in the apartment, he was sent away by the Hundred Ton King and came to the world of Zero Zone. He was picked up by the two protagonists in the void. After waking up, he found that the game he made had also come with him and inherited the first character, Yuichiro Tsugikuni. At this time, the brother and sister were still novice rope makers who had just embarked on the road of "rope makers".

In order to repay the favor and also to test his own strength, he resolutely decided to become the other party's agent, "I will protect you two until the end of the world."