Naisho no Tsubomi is a critically acclaimed manga that tells the story of Tsubomi Tachibana, a fifth...
I read this back around 3rd-4th grade and was one of the things that taught me about discharges, menstruation, etc. I haven't reread it yet, although i remember being so confused by the ending. But take my confusement with a grain of salt since I read this with very little understanding of english since its not my first language