Had two classmates like this back in middle school. All of us were thinking "it's about bloody time" when they finally started dating. They got married about 3 years ago after dating for almost 10 years.
I really like that title, goes quite well with the combined tags of Vanilla and Osananajimi!
Great ending by the way. I like how somewhat awkward they were with each other when they just woke up, but then after that, skipping school to go on a date? He definitely has his priorities straight.