Naisho no Tsubomi
Just as Tsubomi is getting ready to start the fifth grade, everything she thought she knew about her life starts to change. Not only has her mother just told her that she’s about to become a big sister, but Tsubomi’s been starting to feel a little strange herself and it seems that there’s a lot more to growing up than she thought! Unfortunately, people’s bodies don’t come with owners’ manuals, so Tsubomi will have to rely on advice from her friends at school... and some of them are BOYS!