Fujimi Shobo
"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. The series finished with the eleventh volume, published on August 20, 2013.