The remake of this book, “In Another World, My Harem Situation Came Out of Nowhere,” has been posted. Please head over to the neighboring page to read it!
If girls are exquisite locks, then boys have the keys.
What happens if you keep using a key to open all kinds of locks?
Answer: You get addicted.
So this is the story of a master key arriving at a locksmith's shop. (I swear.)
[The Serious Version]
A boy who has just been confessed to by a girl unexpectedly arrives in another world and obtains a “key.” It can help others raise their ability ceilings and break through bottlenecks. But it has one drawback: any woman enhanced by the boy becomes hopelessly dependent on him and develops an insatiable need for him. It's far too addictive...
After that, monster girls, devout saintesses, loyal heroes, tsundere princesses... Nearly every supreme being has accepted an enhancement from the key for one reason or another... Ahem. The boy despairingly faces the countless women desperately searching for him and chasing him, their gazes burning with desire...
As he teeters on the verge of giving in, he doesn't know that his girlfriend has arrived too, in the role of a savior...
From this moment on, a surging tide of calamity, unspeakable secrets, and a chaotic, shattered world begins to transform. Beneath the shadow, a pale song heralds change.
