What Should I Do If I'm in a Different World but It's Also Fw?

[No harem, no routines, no invincibility, no system] Ordinary high school student Isaki Hirobumi lost his life in an accident. When he woke up again, he was already in a strange world. He thought it would be a smooth sailing second life, but when he saw his appalling physical condition... "Isn't this still a fw?"