This one's about two boys at the beach.
There's a threesome in this one as well as an octopus that makes an appearance at the beginning of the manga.
Oneshot from Waka Papa Uke! Author: Tomcat Language: English Japanese version http://myreadingmanga.info/tomcat-waka-papa-uke-jp/
Son wants his dad to teach him about sex.
Title: Walpurgisnacht Circle: Reflection (U-hi) Language: English
Title: Walking Together Pairing: Riku x Sora Circle: RS (Samwise) Language: English
Pairing: Riku x Sora
http://yaoihavenreborn.com/doujinshi/underwater-lovers