Kiitarou thinks he's cursed when a perverted yokai forces him into every ecchi scenario imaginable, except the joke is that he's genuinely miserable about it. Most harem comedies sell you on the fantasy of drowning in women; this one sells you on a kid actively fighting for his life. It's a bonus episode that exists purely to roast the genre it lives in, which means you either get it immediately or wonder why anyone bothered.
Kiitarou keeps stumbling into the familiar setups of ecchi manga, all thanks to Lucky Eros. He does not see any of it as good fortune, and he works hard to steer clear of whatever keeps happening between him and the female youkai around him. This comedic, supernatural special is an unaired thirteenth episode of Kiitarou Shounen no Youkai Enikki, released as a bonus on the series' DVD and Blu-ray.