Yoiyami Gentou Soushi

Lowly back-alley doctor Kyoutarou, open-minded playboy Torazou, and Mitsuri, the beautiful owner of an antique shop with a bewitching aura. Wherever these three go, strange tales of the supernatural tend to unfold. When they peek into what lurks beneath the murky depths of the peaceful everyday, what stares back at them...

(Source: Kadokawa, translated)