When a Hollow who has been alone for a hundred years unexpectedly obtains a System and discovers that he can travel from one world to another, will he still let himself remain lonely?
It's just a harem story dressed up as an everyday-life crossover...
P.S. One shut-in's extremely indulgent fantasy. This book is purely fictional. Any resemblance would be an honor.
This novel and its characters are purely fictional. Any resemblance is purely coincidental. Do not imitate.
