[Following the VR version of Karamizakari, the series is being made into a live-action series!] In the main story of Karamizakari, Takanari was taking summer classes alone. This is a special edition that depicts the summer story of Iida, Takanari's crush, and his best friend Takashi, who were busy developing their sexuality. Takashi, who is pursuing sexual pleasure, is enjoying threesome sex with Niyama and Iida, and had planned to enjoy threesomes today, tomorrow, and all summer, but Niyama is going on a family trip. While he is reluctantly indulging in masturbation, Iida arrives alone. Iida is also drowning in the pleasure of sex that he has just discovered... He is silent, but occasionally shows his naughty nature, his body flushes with the intensity and summer heat, and his whole body throbs with pleasure at being developed... They lose track of time and simply mix together, covered in sweat.