First of all, the characters are very interesting and believable. One of the main characters is actually bordering an oyaji-type, and that's very refreshing in the ocean of bl mangas that frequently revolve around high school/college students only. Every character has many layers that are revealed slowly through the course of the story - this keeps you hooked and wanting to find out more.
There is nothing overly dramatic about the plot development. The story progresses naturally. The build ups leading to turning points or climatic moments are very well thought out, so nothing appears forced. For once, it isn't about two guys who jump into each other's pants and are suddenly head over heels in love/lust... The emotional development is well-paced and its easy to empathize with the characters.
Some moments of tension are conveyed simply by a few frames and no dialogue at all. But you really feel the implication of a single glance or a shake of the head.
There are also a lot of really cute moments *3* too
