Otaku's Fantasy – Visual novel for adults, in which the user can take control of an ordinary cleaner who has been surrounded by all kinds of girls. The protagonist gets a job in a prestigious office, whose employees work in the programmatic industry. Throughout passage it will be possible to communicate with secondary characters – this moment is fundamental. With girls it will be possible to make acquaintances, the result of which depends on the actions of the protagonist.

A player in Otaku's Fantasy can start a love relationship to become closer with the surrounding heroes. At some points, it will be possible to make an independent choice in dialogs, which determines various options for continuing events. Thus, there are many variations of how the events will unfold. Having made this or that choice, it will be possible to get different endings. However, there is no division into correct and incorrect actions. Everything that the user will do is considered permissible.

Relations can be built with five heroines:

• Julia is a girl whose age is 22 years, poorly educated and stupid.
• Hinata Ayane is a 26-year-old newsing news.
• Taukimaru Maki is an entrepreneur who conducts her own business.
• Shinoda Hadai is an office worker who has recently graduated from a higher educational institution.
• Syraki Kyoko is a married lady who is 28 years old.