Here is the full list of all 10 Hentai Crush achievements. It takes around 2-3 hours to unlock all of the achievements on Windows.
Make Miko get high
Make Yukino get high
Make Hitomi get high
Make Sera get high
Make Emica get high
Make Yufei get high
Make all 5 girls get high in 50 days
Give any girl a gift 15 times
Successfully ask girl on date for 15 times
Make Suyi get high