Reincarnated as an Angel, I Refuse to Be Forced into Love by the Crown Prince

[Western fantasy + healing + heartwarming + angels + gender transformation + slice of life + another world + no System] Not long after starting high school, he ran into the school's beautiful long-haired, dark-haired campus queen. When seven thugs cornered her, he rushed in to play the hero and earn another boost to her favorability. Instead, he got killed and had to start over. When he woke again, the first thing he saw was the breathtakingly holy scenery of Heaven. The angel Gabriel led him along, and when he finally stood before the lofty God, he was given a mission to become a “divine emissary.” He'd thought he'd become an invincible hero, head down to another world, crush everything there, win the favor of beautiful girls from every race, and build a harem before settling into a happy life. But the so-called “divine emissary” mission was completely different from what he had imagined! Huh? Why did I turn into a girl? And an angel girl, at that! What kind of absurd start is this? At least Sister Sariel is here with me, so I can't complain too much! When he faced God again at the age of ten and was told to descend to the mortal realm and become a true angel, he thought he was finally being sent to turn the tables against fate. Instead, he became a church saintess who did little more than coast through life. He figured he'd just put in a few decades and then head back. But then he met a domineering crown prince who had been reborn, and he kept pushing her into a corner. No! What kind of absurd start is this?!