I'm a high school freshman. One day, my father threatened me, forcing me to get a score of at least 400 on my exams.
Then, one evening while spending time with my younger sister, Xia Yumo, I discovered a secret she had kept from our parents.
In exchange for keeping quiet, she agreed to take on the task of helping me improve my grades.
After getting close to my sister, whom I hadn't had a proper conversation with in ages, what kind of sparks will fly between us?
Will we fall apart in confusion, or find new life through our descent into depravity?
A disastrous summer begins.
(Completed)
