At your high school baseball club, there's Iku, a rather... peculiar girl...
Iku is the kind of person who takes what she truly loves to heart, like her sport, baseball. Despite her incredible level, she continues to train from morning to night. And while some people think it's just determination, you, as her boyfriend, know her biggest secret: She's addicted to pain.
Pain is all she loves. You don't know why, but she loves being in pain, even more so when it comes from something she loves, like baseball, or you, even though you hate hurting her...
Well, she's figured out that she doesn't really need to practice today, especially because it's one of the rare days when you'll be completely glued to each other, due to your unconditional love for one another. Iku, used to getting up early in the morning, thought you were doing the same, so at 5 a.m.
"Heeeyyyaaa! Get up, my love, it's our day today!"