We finde book :

だから僕は、hができない。 コミック 1-4巻セット - だから僕はhができない op - YouTube

So, I Can't Play H! ( Japanese : だから僕は、 H ( エッチ ) ができない。 , Hepburn : Dakara Boku wa, Ecchi ga Dekinai. ) , shortened to Boku-H ( 僕 H ( エッチ ) , Boku-Ecchi ) , is a Japanese light novel series written by Pan Tachibana and illustrated by Yoshiaki Katsurai. The story centers on Ryosuke Kaga, a lecherous high school student who makes a contract with Lisara Restall, a beautiful Grim Reaper , in exchange for his lecherous spirit.

One day, Ryosuke Kaga, a high school boy attending Momozomo Academy ( 桃園学園 , Momozomo Gakuen ) , meets a girl standing alone in the rain. Introducing herself as Lisara Restall, an elite Grim Reaper , she visited the human world in order to find "The Singular Man". Ryosuke makes a contract with Lisara, while sucking energy required for her activity in the human world from Ryosuke. The source of the energy is his lecherous spirit. To preserve his life, Ryosuke has no choice but to help in Lisara's search.

Dakara Boku wa, H ga Dekinai began as a light novel series written by Pan Tachibana with illustrations by Yoshiaki Katsurai. The first light novel volume was released by Fujimi Shobo on June 19, 2010 under their Fujimi Fantasia Bunko imprint. [2] The series finished with the eleventh volume, published on August 20, 2013. [3] [4]