TG, AP, male AR on H-comic "I am a succubus?"

[Suning]

japanese name: 僕はサキュバス?
Hentai comic from TSFのF.
Boy says that his older brother is annoying to a magician then she gives him a colar, when he wears it he turns into a young succubus then every time after sex (with her older brother) she AP after it while the brother get's AR'ed.
Later her older brother(now a little boy) drinks from her breast and turns into a little girl

Boy > young succubus TG
http://puu.sh/pyO8w/e74d4632e3.jpg
http://puu.sh/pyO9c/49dd0fd15d.jpg
http://puu.sh/pyO9A/f07e546839.jpg
http://puu.sh/pyO9W/4c543047d2.jpg

succubus AP, guy AR
http://puu.sh/pyOhg/bebf8a2bac.jpg
http://puu.sh/pyOhq/9bc8f69972.jpg
after second sex AP, male AR
http://puu.sh/pyPMq/fb5bb63971.jpg
http://puu.sh/pyPN6/c90026b719.jpg
after third sex boy > little boy AR
http://puu.sh/pyPRf/a404be2c7a.jpg

little boy (same guy who got ARed) > little girl TG
http://puu.sh/pyOoP/89602aa0d5.jpg
http://puu.sh/pyOp9/16f13becd3.jpg
http://puu.sh/pyOpv/a6c2d212d7.jpg

comic ends up here but it says it will continue maybe his little brother will be end up as an imp?