Heika, Kokoro no Koe ga Dadamore desu!
Your Highness, the Voice of Your Heart is Leaking!
It's completed at 68 chapters. Is there a epub/pdf available?
https://www.novelupdates.com/series/your-highness-the-voice-of-your-heart-is-leaking/
Here (http://www.vn-meido.com/k1/index.php?topic=9428).