RH Plus (Japanese: RHプラス, Hepburn: Āru Eichi Purasu) is a Japanese manga series written and illustrated by Ayako Suwa, serialized in Enterbrain's B's-Log Comic between 2006 and 2009.

The series has been collected in four tankōbon volumes and was licensed in English by Digital Manga Publishing.

Kiyoi is the eldest who takes care of the others and acts as a father figure, Masakazu is a college student who gets information on criminal activities, while the youngest members, Ageha and Makoto, are high school students.

[3] A live-action series adaptation produced by Tokyo MX was announced on December 18, 2007.

It was directed by Ryūichi Ichino, written by Megumu Sasano and Kimiko Ueno, and starred by Yū Miura, Rakuto Tochihara, Naoya Ojima, and Hassei Takano.