Shinjite Okuridashita Hitozuma no Ami ga Dousoukai de Motokare ni, NTR Namahame Choukyou Sareru Wake ga Nai!

Ami's ex takes her back at their high school reunion,
even though she's now a happily married woman.

It's a one night stand full of firsts, even with an old lover:
her first affair, her first anal, cosplaying and f*cking
with a camera to document the dirty deed.

She even has a phone conversation with her husband
while her ex-boyfriend is deep inside her.

[From DLsite English]