Secret Mission: Sennyuu Sousakan wa Zettai ni Makenai!

This is the R18 version which includes adult sex scenes!

Undercover agent Riko Ikazuchi and her partner Noma infiltrate an apartment that is also the hideout of a criminal organization. They pretend to be newlyweds. However, when the perpetrators don't hear any sounds coming from them at night, they become suspicious.

To convince the perpetrators that they are a married couple in love, they start touching each other and making noise...