u/Joga5000

Office lady yuri about a woman who is training under the number one employee in the company, who lets her in on her secret...

Mangaka is Yuni, who almost exclusively does office lady yuri, and she's also the author of "I Love You So Much, I Hate You" (available officially in English) which is also really good.

Link (NSFW): https://dynasty-scans.com/chapters/ill\_let\_you\_in\_on\_my\_secret#1

You can support the author on her Booth page (digital download in Japanese): https://yurikuzu.booth.pm/items/1232601