Eiyuu-sama, Wakeari Osanazuma wa Ikaga desu ka?

When a young wife dotes on her husband, a newlywed life full of gap moe is waiting for them...‘I want to pamper and flirt with my beloved hero even more!’
The 15-year-old, pretty princess Tenealia's political betrothal was to the lonely Emperor Yudding, who is known as the ‘Blood-soaked Fiend’ and is feared by everyone. But instead of being afraid, she somehow fell in love with the big, evil-faced man she had never met before, from the bottom of her heart! Aiming to pamper Yudding thoroughly and make him happy, she begins to actively press in on him every day. But Tenealia has a certain secret!

Original Web Serialization
https://www.cmoa.jp/title/308155/