A little ecchi Love-Comedy Between Apparition Onee-san and Human Shota-ish. Yuuki Kuwahara, a boy who decided to live alone at his father 's parents house when He entered high school. He used to plays alone at his grandparents house ... with a pleasant expectation that He may meet again with a longing person He met when He was a child! However, in that house where nobody was supposed to be live in. But, the unexpected welcome waited for Yuuki ...! Boy and Youkai Girls will living under the "one roof"! Heartwarming oneshota love comedy started!

• Onee-chan wa Koiyoukai