This game is so cozy and erotic, I really liked it. It’s not (only) about oral sex, but about understanding the relationship between the two, their desides and fantasies. In fact, the title of this game it’s “Hima Na Futari”, that is something like “free time between two persons” rather than Himana 2 (there’s no Himana 1!).

The game works like this:
Talk > Advance in story (“return” will end the game)
Chat > Select a subject and talk about it
Every other option > Select it multiple times to unlock dialogues and more options

Numpad works!
1~4 during blowjob increase speed
5 is for zoom
0 for toggle blindfold/glasses if unlocked

You can skip dialogues, but I suggest to read everything (even if MTL).

Thanks for sharing!