Boku no Shokora (2012)

“'I will exchange your younger brother back to you in return for your homemade chocolate.’ In order to save her younger brother, the heroine Komachi makes her way to the one who sent her this letter with the chocolate in tow. The sender is Takaomi, the son of a distinguished family who is the owner of a corporate enterprise. Komachi thought this ordeal would be over if she just handed over the chocolate, but it seems Takaomi has a few more demands than just the ransom…“