Doujinshi by the circle Awareness.

Parodies:

1: Hayate no Gotoku!
2: Hayate no Gotoku!
3: Hayate no Gotoku!
4: IS
5: Boku wa Tomodachi ga Sukunai
6: Boku wa Tomodachi ga Sukunai
7: Boku wa Tomodachi ga Sukunai
8: Boku wa Tomodachi ga Sukunai
9: Papa no Iu koto wo Kikinasai!
10: Ore no Imouto ga Konna ni Kawaii Wake ga Nai
11: OniAi
12: Ore no Imouto ga Konna ni Kawaii Wake ga Nai
13: Ore no Imouto ga Konna ni Kawaii Wake ga Nai
14: Ore no Imouto ga Konna ni Kawaii Wake ga Nai
15: Monogatari (novel series)
16: Nisekoi
17: Kantai Collection -KanColle-
18: Kantai Collection -KanColle-
19: Kantai Collection -KanColle-
20: Kantai Collection -KanColle-