Kagi no Kakatta Heya

Lawyers Serizawa Gou and Aoto Junko are asked to investigate the case of President Ooishi, found dead in what looks like a suicide in a locked room. They ask security expert Enomoto… read more

One must be careful while having dangerous spiders as pets. No one knows when it can bite you. Or did someone else make that happen?

This time the locked room wasn't actually locked, but it was still in a locked room case. How does anyone escape from a room that can be closed only from the inside?

This time the locked room is in a theatre. The only way for the culprit to escape would have been to cross the stage in the middle of a play, which seems impossible. But is it really? read more

A young girl is killed in her own home. The main suspect is her older brother. Is this the first locked room that cannot be unlocked?

This time the locked room is in a locked situation not because of an actual lock, but because of a guard dog outside.

Two suicides in a trading company that seems related to mafia. Or were they murders?