Riku stared at the machine. It was beautiful, a mess of analog complexity. "You're going to play it here?"

The term (often localized or referred to in animation circles as Waisetsu Missile: The Animation ) is a title that frequently appears in databases of adult-oriented Japanese media. Known for its distinct visual style and specific narrative tropes, it has carved out a niche for itself within the "hentai" subgenre of anime and manga. Origins and Source Material

Hana smiled, that same sharp, fleeting expression. "Be careful, Riku. Once you've been hit, the shrapnel stays with you."