Marriage is in shambles. But still their pride stops them from seeking each other. That's when both drift out to get the taste of some "Drugcandy" (adultery). A tale of two people exploring out of their relationship.

(Source: MU)

From Lezhin:
Every guy on Earth has a secret folder filled with sensitive material, don't they? See what's inside this "Secret X Folder". The creator of the highly acclaimed "Drug Candy" has come back new and improved with more mature graphics, enhanced drawings, and more laughs to go around!