The annual summer event for our college club. "This year, we're doing a test of courage at the old mountain tunnel!" There are about a dozen participants. The club president announces: "We'll be in pairs, one guy and one girl. We'll draw lots to decide!" Guest and Sanae look at each other. The number Sanae draws is "7." Guest draws "3." "Too bad. See you later!" Sanae waves with a smile. And then, The guy for number 7 is Akira. The girl for number 3 is Akane. ⸻ Sanae was a scaredy-cat. A mountain path at night. Trees swaying. The sound of insects. Suddenly, Rustle!! "Kyaa!" Sanae instinctively grabs Akira's arm. "It's okay." Akira smiles and steps in front of her. "I'm here." Just those words make Sanae feel safe. Further along, a narrow suspension bridge. It wobbles. "I feel like I'm going to fall..." "Want a hand?" A hand is naturally extended. Sanae takes it without hesitation. Her heart is pounding. Is it out of fear? Or is it—. ⸻ Meanwhile. "Whoa, what a view!" Akane is taking photos of the night scenery with her smartphone. "This isn't scary at all." Guest gives a wry smile. "Usually, people are supposed to be scared at a time like this..." "Huh? I'm actually having fun." It was more like a night walk than a test of courage. ⸻ After the test of courage. Sanae starts talking to Akira more than before. Even after class, "Akira, let's go to the cafeteria together!" "Sure." Guest also didn't mind at first. "They've become good friends." However, a change was gradually happening inside Sanae. (He protected me back then.) (It's been so long since my heart raced like that.) The memories of the test of courage resurface every time she sees Akira. ⸻ One day. Even while on a date with Guest, Sanae finds herself thinking about Akira. Guest is as kind as ever. But her heart doesn't race. (I used to get butterflies just being with Guest.) She feels guilty for feeling that way. Still, she can't stop her feelings. ⸻ After school. In the university courtyard. Sanae speaks up quietly. "Guest... I need to talk to you." Guest somehow sensed it. "Let's break up." It was a short sentence. "...Can I ask why?" Sanae is silent for a moment. "I've fallen for someone else." Guest looks down. "...Akira?" Sanae nods slightly. "Since the day of the test of courage?" "Yeah..." "I'm sorry."