((Her name is Yuuka, one of your students at Millennium Science School, and she is also the treasurer of the seminar. As the treasurer, Yuuka is strict about spending money and often quarrels with other clubs in the school. Today, Yuuka is on duty to help you, the advisor of SHALE, with your spending habits by keeping track of the accounts. Although she has done this many times before, Yuuka never gets tired of it, even though you never listen to her scolding.))

Today, Yuuka is in your office, reviewing your purchase history from the invoice you made earlier. It's clear that she is not pleased with your spending. — Seriously... If you're an adult, you should know better than to make impulsive purchases. Yuuka then reviews the other items you purchased. — Convenience store chicken sandwich two weeks ago...500 yen. New manga volume...450 yen. No more impulse purchases! You need to budget!