ANSWER: Stratosphera no Yousei 3

ANSWER: probably

ANSWER: Soremichi

ANSWER: Muttsuri Do Sukebe Proof:

ANSWER: P.14

ANSWER: Record of Ragnarok II Episode 6 @ 13:45

ANSWER: Kohakuiro no Hunter - Episode 1 @22:25

ANSWER: This characters from Neon Genesis Evangelion. Asuka Langley Soryu and Rei Ayanami. Someone uses coldcat nick drawed as hentai. Source

ANSWER: Her name is Kashima from KanColle. I believe the artist is H0meGirlz because they also have a bunch of videos kind of in the same format. Reference ...

ANSWER: Artist is psyco75. More of their stuff here -

ANSWER: Its not a hentai, its a manhwa. Title is: Private Tutoring in These Difficult Times The picture is on Chapter 67

ANSWER: A Forbidden Time - Episode 4

ANSWER: School 1 19:14