The Colorless Colorful Spirit is in Agony!

'''Introduction to the Work: You'll starve to death if you don't have your first sex?! The chaotic two-man seduction chronicles of the charmless incubus, Do Haewon! Unlike his older sister, the ultimate incubus, Do Haewon is a deficient incubus who can't even properly feel sexual sensation. Failing to feed every time due to circumstances too embarrassing to speak of, he finally gets kicked out of his sister's house where he'd been mooching off her. A few days later, under the pretext of helping his university junior, Kang Euijun, with an assignment, Haewon visits Euijun's studio apartment and unexpectedly seizes a chance to feed. Not one to let a golden opportunity slip away, Haewon does...