Text version : 2-159
Textless version : 160-283
Extra : 284-319

Source:
http://www.dlsite.com/maniax/work/=/product_id/RJ212065.html

I could read about 90% of it but I don't have the patience to do a translation myself...A short summary for your imagination while we wait for someone to finalize a translation.

Kid comes home. Sis didn't go to school. Kid yells at her and scolds her. Sis says doesn't want to go to school because a social life is too much work. She likes ecchi things but doesn't feel like dealing with the social requirements involved. Dating is a pain in the ass. She'd rather have a guy just let her use his dick whenever she wants. Kid says no guy like that exists. Sis proceeds to seduce him with her giant grade-schooler tits. I'll leave the rest to your imagination for now :)

Base +6, tatsu2742 +6

Onii, I don't take care of you. Just help yourself.

http://www.dlsite.com/ecchi-eng/work/=/product_id/RE212065.html

Your little sister Kana-chan is such a lazy girl.
She likes doing sexual things, but it is too
bothering for her to find a boyfriend.

So she asks you to lend a d*ck...
But from her laziness, Kana-chan is...

Base +7