Devil's High School D×D Season 2

Hyoudou Issei (Kaji Yuki) ) is a famously lecherous boy in the school, so he is disliked by many girls. One day, a mysterious beautiful girl named Amano Yuma (voiced by Hitomi Natamu) suddenly appears in front of Issei. Not only did she confess to Issei, but she also asked for a date. Could it be that Issei's spring is coming like this? What Issei didn't expect was that during their first date, he would be killed by Yuma Amano. It turns out that Yuma's true identity is the lower-level fallen angel Linali. She accepted the order of the church and came specifically to assassinate Issei. Just when Issei was about to die, the recognized school beauty Rias (voiced by Hikasa Yoko) appeared in front of him. She used the demon chess piece to resurrect Issei and made him his dependent. What is the church's real purpose in assassinating Issei? How will Issei face the life of resurrection from the dead?