
I always like the "really touchy best friends that everyone around jokes that they're like husband and wife but really they're just friends until they become more... *Wink* " yaoi story line, I don't care if it's in school or an office if you can recommend any mangas that fits this description please share them with meヾ(☆▽☆), thank you.
I know you're looking for a yaoi manga, but maybe this one? http://www.mangago.zone/read-manga/gunjou_no_subete/
I loved seeing them grow (and I loved how it stayed pg until they were grown!)