Hitori Heya no Kagi Azukemasu: Suteki na Daiichihakkensha

A single man and woman exchange a key with a new acquaintance!? What will become of this friendship that began with the goal of avoiding a lonely death?! "If you suddenly die, I'll be the one to find you." Kii-chan, the manager of a recycle shop who's terrible at tidying, and Mr. Song, a freelance designer with a clean-freak. The two exchange keys to each other's apartments in order to avoid dying alone...!?

A slightly twisted story of friendship between a man and a woman that reveals important things! Packed with tips on tidying up, trivia on avoiding a lonely death, and recipes.

(Source: Akita Shoten, translated)