Ume GH

Hi! I'm trying to find a yaoi manga whose name I can't remember. The most I recall is that the plot was "Secretary x Boss." The secretary (seme) is in love with his boss (uke), but I don't remember if he initially admitted or acknowledged his feelings or mistook them for admiration. They both reciprocated their feelings, so I remember the plot being romantic. I also remember a specific scene where the secretary (who wanted to take an exam or a course or something like that, to be a better employee) is taking a call and remembers that his manual said he should smile even if the customer wasn't looking. The secretary had dark hair and the boss had light hair. I remember it's been quite a few years since I read it; it's one of those old manga with a cliché plot, but I really liked it a lot, and I can't remember the name. (〒﹏〒)

Does anyone happen to know which manga could it be?

Hey there! If someone could help me if you know the name of this manga, it's about three guys who are childhood friends, if I remember well, one of them is blonde, another one is tall with black hair and glasses, and the last one I think has red or brown hair and has an obssesion with cleanliness, doesn't like bacteria and he doesn't share his food with nobody than with his friends (the previous two).
The blonde (I think his name is Eita, Don't remember very well) is in Love with the one with black hair but he thinks he goes out with his other friend (the one with the cleaning obssesion) but in the end, Eita and the black hair guy end up together.
The other one also falls in Love with another guy that went to the same school with the in the past xD
I tried to describe it as thoroughly as possible in case someone recognize it.
Please heeeeelp! T_T D:
I really loved this manga!