Doki Doki Yokai Love Battle! ~ Great Yokai War! summary:

BOOK ☆ WALKER's popular electronic comic is finally published in a book!  A beautiful witch mother, a rugged but beautiful older sister, a lovely younger sister who longs for him, and a cute and gentle childhood friend.  An ordinary high school student, "Mitsuteru Minamoto," who is not good at horror, lived a manga-like life that all the boys in his class envied, although he didn’t have a girlfriend .  ――But it changes completely after his 16th birthday.  Many beautiful women attacked in search of the power hidden in the birth of brilliance.  ... that's also a youkai.  What's more, the attack was a life-threatening color scheme!  !!  The fate of brilliance suddenly struck into the world of school horror from a school romantic comedy ...!??