An OTK spanking-focused story featuring an older brother and younger sister.
Mirei is the youngest child of 3 siblings， and has a diligent and dependable personality.
She has something she enjoys doing in secret: peeping on her naughty older sister getting her butt spanked by their older brother.
However， with her big sister getting older， their big brother has stopped spanking her out of consideration for her.
Mirei is disappointed at this， but also realizes she will also soon be of that age.
If she wants to be spanked by her brother， this year will be her last.

’I wanna be spanked by onii-chan too...’

Cover page ＋ 24 pages of black and white main content