With a hikikomori older brother for 10 years, a strange love that cannot be shared with anyone. 'I'm not upset... Because Onii is my hero.' My sister tries to comfort her when she sees her dark demeanor. One day, I accidentally saw Ji-Po in the morning, and I had to say, 'Hey, do that with your hands.' From then on, the demands to ascend and go beyond limits... The dirty room became our secret base...