EDGE Series: Kamigami no Inai Hoshi de - Boku to Senpai no Wakusei Craft

In the 1990's in the sprawling college town of Tachikawa, Sumiyoshi Izumi was enjoying student life playing 8-bit and 16-bit games at the Gaming Club, when a big-breasted senpai moved in next door. And suddenly they were chosen to be the "human representatives" in the creation of a new alien world?
(Source: Kadokawa, translated)