Welcome to a carrd for Harada's BL manga The Song of Yoru and Asa, also called Yoru to Asa no Uta or 「よるとあさの歌」。You can also find out more information on the fandom wiki for
The Song of Yoru and Asa Encore.

The summary on the back of volume one of The Song of Yoru & Asa.
Names and descriptions of all the characters in the manga.
All the volumes, dojinshi, chapters, and inserts featuring Yoru & Asa.
More information about Harada, the author of Yoru & Asa.
For more specific information or questions, feel free to DM me!

Asaichi, looking to be more popular with the ladies, starts a band with his friends. Leading his new, small-time band as the vocalist, he is joined later by a supporting bassist named Yoru.However, during a bit of post-concert "fun," there was a small accident, bringing Yoru's feelings for Asaichi to light.Normally the thought of being with another man would disgust him, but after Asaichi heard Yoru sing, he was overcome with lust, and violently desired to feel Yoru day after day.This is a story that centers on Yoru and his one-sided love, his rapidly growing desires, and intense jealousy... Where will these feelings take us?
Characters

Asaichi
朝一
Asaichi sings vocals in a band, a career that he hoped would help him pick up chicks. Initially, as a straight guy, he's disgusted by Yoru's overwhelming attraction to him, and the disgust remains even as his feelings towards Yoru turn to lust. When Yoru helps him after he's attacked by the yakuza Iori and Tomoki, Asaichi starts to realize that maybe his feelings for Yoru are something more. Finally, after months of thinking over his feelings, he asks Yoru to date him.Despite Asaichi's initial shallow intentions for starting his band, he has since grown invested in its success. He's somewhat short with an average voice and looks. Asaichi is optimistic and enthusiastic, but he tends to be hot-headed and has a bit of an inferiority complex.

Yoru
ヨル
Yoru has been one-sidedly in love with Asaichi since watching Asaichi's band perform in middle school. Driven by his love for Asaichi, he also becomes a vocalist in his own band; when his band breaks up, he learns bass to fill in a newly empty spot in Asaichi's band. He's open with his feelings towards Asaichi, and is willing to accept any relationship with him, even if it's one-sided and far from healthy. Yoru helps Asaichi after he's attacked by Iori and Tomoki, and is overjoyed when Asaichi asks him out a few months later.Yoru is primarily motivated by his love for Asaichi, including in his career choice, though he's naturally a gifted singer and songwriter. His voice and appearance are so exceptional that he's the most popular in the band, to the extent of attracting stalkers. He's generally ditzy and absent-minded.