Here is the full list of all 100 Hentai Summer achievements.
Completed Normal 1 one time
Completed Normal 1 two times
Completed Normal 1 three times
Completed Normal 1 four times
Completed Normal 1 five times
Completed Normal 2 one time
Completed Normal 2 two times
Completed Normal 2 three times
Completed Normal 2 four times
Completed Normal 2 five times
Completed Normal 3 one time
Completed Normal 3 two times
Completed Normal 3 three times
Completed Normal 3 four times
Completed Normal 3 five times
Completed Normal 4 one time
Completed Normal 4 two times
Completed Normal 4 three times
Completed Normal 4 four times
Completed Normal 4 five times
Completed Normal 5 one time
Completed Normal 5 two times
Completed Normal 5 three times
Completed Normal 5 four times
Completed Normal 5 five times
Completed Normal 6 one time
Completed Normal 6 two times
Completed Normal 6 three times
Completed Normal 6 four times
Completed Normal 6 five times
Completed Normal 7 one time
Completed Normal 7 two times
Completed Normal 7 three times
Completed Normal 7 four times
Completed Normal 7 five times
Completed Normal 8 one time
Completed Normal 8 two times
Completed Normal 8 three times
Completed Normal 8 four times
Completed Normal 8 five times
Completed Normal 9 one time
Completed Normal 9 two times
Completed Normal 9 three times
Completed Normal 9 four times
Completed Normal 9 five times
Completed Normal 10 one time
Completed Normal 10 two times
Completed Normal 10 three times
Completed Normal 10 four times
Completed Normal 10 five times
Completed Hard 1 one time
Completed Hard 1 two times
Completed Hard 1 three times
Completed Hard 1 four times
Completed Hard 1 five times
Completed Hard 2 one time
Completed Hard 2 two times
Completed Hard 2 three times
Completed Hard 2 four times
Completed Hard 2 five times
Completed Hard 3 one time
Completed Hard 3 two times
Completed Hard 3 three times
Completed Hard 3 four times
Completed Hard 3 five times
Completed Hard 4 one time
Completed Hard 4 two times
Completed Hard 4 three times
Completed Hard 4 four times
Completed Hard 4 five times
Completed Hard 5 one time
Completed Hard 5 two times
Completed Hard 5 three times
Completed Hard 5 four times
Completed Hard 5 five times
Completed Hard 6 one time
Completed Hard 6 two times
Completed Hard 6 three times
Completed Hard 6 four times
Completed Hard 6 five times
Completed Hard 7 one time
Completed Hard 7 two times
Completed Hard 7 three times
Completed Hard 7 four times
Completed Hard 7 five times
Completed Hard 8 one time
Completed Hard 8 two times
Completed Hard 8 three times
Completed Hard 8 four times
Completed Hard 8 five times
Completed Hard 9 one time
Completed Hard 9 two times
Completed Hard 9 three times
Completed Hard 9 four times
Completed Hard 9 five times
Completed Hard 10 one time
Completed Hard 10 two times
Completed Hard 10 three times
Completed Hard 10 four times
Completed Hard 10 five times