For 10 points, name this body of water from the grace of which a Yukio Mishima sailor has fallen and which also titles his tetralogy.
This word concludes the title of a work in which a group of schoolboys murder a kitten and later poison Ryuji before he can marry Noboru's mother because they are disgusted with his change in profession. This word also appears in a metaphorical usage in the title of a series in which Toru is among several characters with three moles under their left arms. That series includes The Decay of the Angel and Spring Snow and follows Kiyoaki's friend Shigekuni Honda. For 10 points, name this body of water from the grace of which a Yukio Mishima sailor has fallen and which also titles his tetralogy.
This word concludes the title of a work in which a group of schoolboys murder a kitten and later poison Ryuji before he can marry Noboru's mother because they are disgusted with his change in profession.
{sea} [Accept The {Sailor Who Fell} From {Grace} With the {Sea} or {Gogo no eik?} before “{also appears}”]