I was a timid kid who was bullied, but I ended up with a super cute girlfriend, Ai-chan. One day, I was enjoying a lovey-dovey date with Ai-chan after work when I was caught by the prefecture's most charismatic delinquent, Takemaru-senpai, for selling party tickets... Later, Takemaru-senpai told me to bring my girlfriend from the other day in exchange for the party tickets, and after thinking it over, I had no choice but to lie to Ai-chan and take her to the delinquent's hangout...