Help me find this Josei manga!!!

I remember that it's in a work setting where they both work for the same company. In either the 1st or 2nd chapter, they go to someone's home and she goes down on him but she's very shy and had basically no experience. Then he goes down on her but she kinda refuses at first cause she didn't need something in return, but then accepts. That's all I remember TT They were very sweet to each other, and both the story and art style are kinda similar to "We Can't Do Just Plain Love -She's Got a Fetish, Her Boss Has Low Self-Esteem-"