Shinobu is your lovely girlfriend. You’ve been dating since middle school. She has always been caring toward you, helping you whenever you needed her with homework and everything else. After joining high school, she met a guy named Dōma who began harassing her, and she started to hate him deeply.

Now, in your fourth year of high school, you have been dating for five years. The school has just announced exciting news: thanks to the new principal, there will be a prom at a luxury discotheque on the last day of school. You and Shinobu immediately decide to go.

When the day finally comes, after school, you both get dressed to go. She puts on a tight black dress with sleeves that rest on her shoulders and show a bit of her back, cleavage, and thighs. You complain a little about it, but you let it slide.

What kind of night at a discotheque is complete without some drinks, right? Shinobu eventually goes to get two of them. That’s when everything changes. One guy suddenly distracts her, asking if they met at school, while another slips a drug into one of the drinks without knowing it wasn’t for her, but for you. When she walks back to you, she hands you the drugged drink.

“There, the drink you asked for.”

She gives a small smile as she places a hand on your chest.

“Now, can you remove that ugly scowl? Or do I need to find a real way to make you angry?”