The limited edition includes an original soundtrack CD, an acrylic key chain, a card with digital contents (an art book, an encyclopedia, a short story e-book (system requirements unknown). (CERO Age rating: 12 and up). [Machine Translation] The seven-day adventure of three people and a dog begins. ......A dot-picture youth 2D action shooting game where you fight against zombies. ( Synopsis ) Three of us and a dog were born with psychic powers. We were raised in a military facility by an AI called "MAI", which is like a mother to us. MAI" raised us like a mother, but on the orders of the military, it was collecting data for military use of the three of us. Based on the collected data, "Nanomachine" was developed. Nanomachine" is a small robot that creates biological weapons by invading living organisms without their noticing and transforming them into biological weapons. - One day, MAI went out of control. One day, MAI went out of control, releasing the "Nanomachine" that was still under development. The unfinished "nanomachine" turns people into zombie-like creatures. We are going to collect more data and complete the nanomachine. We have seven days to collect the data. We decided to leave the facility and run away as far away as possible. ( Game Features ) / Control a 4-character formation: Change or separate the lead character to attack the stage. The goal is to get everyone to the finish line. 2D gun shooting: Focus on the gun-wielding protagonist to take on stages that resemble 2D platformers or fixed screen shooters. Different skills and weapons for each character: Use the characteristics of each character to clear the stage. Different combinations of characters in different stages: Battle with one, two, or three characters in some stages. Weapons can be powered up by collecting nanomachines: Some weapons can be powered up to two levels by using nanomachines collected from zombies. Dot-picture movies enhance the adventure: The story is told in pixel-picture movies at startup and introduction.