The characters are well written and believable. This includes the male MC, who has a distinct personality and appearance that separates him from the pack of self-inserts and quite-studious types that often appear in these manga. Both main characters have lives and goals that involve more than just their relationship to one another, but the romantic aspect is still the driving force. It's a delicate balance that I think Ojiro mostly gets right.
The story is minimal. It's a true slice of life, in that there are very few standout events or dramatic turns. It unfolds at a calm, steady pace, makes for a lovely read before bed.
Ojiro is a rising star in the genre for a reason. She's writing Seinen romance manga that seem to exist in their own, private realm, full of landscape shots and silent interactions. Her art is unique and expressive. Her women are more interesting and attractive than those written by male contemporaries, and her men are too. She hasn't written her masterpiece yet (jury's still out on "Insomnia"), but I'm sure she'll write one.
Point is this:
Read Ojiro Makoto! Read Ojiro Makoto! Read Ojiro Makoto!
