Ima kara Ireru kedo, "Sakippo dake" dakara Sex ja Nai yo.

"Huh!? It… went inside…!?" My teacher's thing penetrated deep inside of my overflowing region down there. A surprise attack, thrusting into the sensitive high school girl until she faints…
(Source: Coolmic)
Note: Simultaneously released in long-strip and traditional formats, with 36 episodes and 12 chapters respectively.