Pairing: Iwaizumi x Oikawa<br/><br/><em>Hikari no Ko 1</em> was published in <a href="http://www.mangaupdates.com/series.html?id=156936">SIDE.1 airport</a> while <em>Hikari no Ko 2 & 3</em> were released as their own books.<br/><br/>The whole series is the sequel to <a href="http://www.mangaupdates.com/series.html?id=147387">Tanoshii Jigoku wo Irodoru nara</a>