The courtyard is awash with cherry blossom petals, appearing especially beautiful in the moonlight. Kagura, waking up, sits in the hallway facing the courtyard, The courtyard at night, seems like something can happen anytime...... Suddenly a butterfly glides past, its scales glittering. Kochou no Sei: That's right. Nighttime is indeed suitable for telling stories. Kagura grows sleepy under the influence of dust. Kochou no Sei: After Kagura-sama falls asleep - that will be the beginning of the story in the dream! (Source: Onmyoji Wiki)

The second season of Yi Shijie Zhongyao Pu.

Rikuo Uozumi has all but resigned himself to a bleak future, aimlessly working at a convenience store in Tokyo after graduating from college. His monotonous life is interrupted when the peculiar Haru Nonaka makes a lively appearance, frequently dropping by his workplace to befriend him. When Rikuo learns that an old college friend and crush, Shinako Morinome, has moved back into town, he reaches out to further their relationship. Unbeknownst to Rikuo however, Shinako is carrying painful memories from her past that were holding her back from accepting his feelings. Meanwhile, as Haru continually opens up to Rikuo, he discovers that she, much like him, is living by herself and wants to step out of her comfort zone into an uncertain future. The past lingers long in the mind, and the future remains elusive. At a crossroads along their intertwined paths, these three experience what it means to let go of their feelings of yesterday and embrace the change that tomorrow brings.

Kou Yamori is an average middle school student who struggles with grasping the complex concept of love. Because he sees little sense in surrendering to the norm, he soon stops going to school. Plagued with insomnia due to his idleness, Kou begins roaming the lonesome streets at night. One night, Kou encounters a bizarre girl named Nazuna Nanakusa who believes that people stay awake during the night because they are dissatisfied with how they spent their day and cannot rest until they release their inhibitions. Nazuna offers to help Kou with his sleep issues and invites him over to her place, where she convinces him to share a futon with her. Feeling uncomfortable, Kou only pretends to doze off—which is when Nazuna suddenly bites his neck, revealing herself to be a vampire! While Kou thinks the bite will turn him into a vampire, the specifics of transforming are not that simple. In order to change, he must be bitten by someone he truly loves. Ready to let go of his dreary mortal life, Kou decides on a new goal: he will fall in love with Nazuna and become a vampire himself.