At the sperm bank, donors are ranked based on their identity and health status, and the method of sperm collection varies according to rank. Particularly high-ranking donors have their sperm collected orally by female technicians inside sterile rooms, and the semen is stored under LEVEL4 strict management at -196 degrees Celsius in ultra-low temperatures. At the sperm research facility, female researchers collect sperm through handjob and use bio-microscopes to closely examine sperm health. Additionally, implantation experiments using sperm and eggs are conducted on female researchers, a process requiring extremely precise and advanced techniques.