The manga series (translated as Only I know that Hinako Hirasaka is erotically cute ) has officially concluded. Series Status and Final Chapter
The story concludes with a time-skip or vision of the future where the couple fulfills their promise to stay together, eventually having a large family. Where to Read
While the official Japanese serialization has finished, you can find the series through several official and community platforms:
Published by ASCII Media Works (KADOKAWA) .
[DISC] Hirasaka Hinako ga Ero Kawaii koto wo Ore dake ga Shitteiru
You can track volume releases and user ratings on Goodreads .
This chapter leads directly into the finale, resolving the central conflict regarding the "witch's curse" and the future fate of the main characters, Hinako and Ouki.