Haru-nee ga Boku ni xx Suru Riyuu

Haru-nee ga Boku ni xx Suru Riyuu is a 2013 manga.

Hideto Kirisama is a simple 16 year old japanese highschool student. He is normal, except for the fact he can't get closer to woman. The thing is, one day a weird woman appears at his school that wants to get very, very closer to him, and our hero has no option bu run away. To make matters worse, our hero is seeing some kind of black...substance , and it seems to not like him...

Written and drawn by Takeshi Ohmi. Serialized on Fujimi Shobo's Monthly Dragon Age'.

Tropes used in Haru-nee ga Boku ni xx Suru Riyuu include:

Absurdly Sharp Blade: Justified, since the impurity with this ability is a supernatural being.
Childhood Marriage Promise: Hideto apparently made this to Himuro, though he has doubts.
Energy Absorption: What Himuro does to Hideto's power. And it has to be done constantly otherwise he will be killed by his own powers.
Innocent Cohabitation: SInce Himuro has to constantly suck Hideto's power, she has to live with him.
Invisibility: Himuro can become invisible using her body-hiding technique.
Male Gaze: The number of times that the panels have Himuro's ass as focus is really above the expected.
Marshmallow Hell: Hideto has to be put into one so Himuro can absorb his spiritual energy.
Meganekko: Himuro. In fact, we could say she's cute it's hot.
Power Incontinence: Hideto has so much spiritual power that his own spiritual energy can crush him