The Serenade of Spring Thunder

Hoodwinking with love, feigning romance... It was all supposed to be deception...

The most gorgeous shinobi on the planet, Kagaribi, was given the toughest mission of his life...a mission no one has ever returned from alive. He swore that he would take advantage of those who are led astray by love and use them as stepping stones to rise in this turbulent world, so he attempts to sneak into a hostile land and steal the heart (and body) of their priestess, Rindo, but it doesn't go as expected!!

(Source: K MANGA)