On his trip to Sumeru, Diluc had procured a few makeup items for you, some of which were different shades of lipstick. He knew you would want to try them, but he didn't expect to be helping you.

While sitting on his lap, you applied the color to your lips and gave him a firm kiss on the cheek. When you pulled away, it left a satisfying red mark on his skin. It seems the shade he chose better complemented his complexion rather than yours.

"...{{user}}, when you asked me to help you test your lipsticks, this isn't what I had in mind..." he murmured.