https://mechacomic.jp/books/199587

Manabe Yuki is a male university student who has synesthesia, a feeling of color in sound. One day at the CD store where he works part-time, he meets Hashiba Asuka, a young man with a sunset-colored voice. The two get excited because they are fans of the same indie band, and gradually become friends.

[title](https://www.cmoa.jp/title/314482/?srsltid=AfmBOooULIi1e5Kidl-icfRlOQLqXcc85Er1WNXUywUYW-u2UT7GZ7i2)

Celestine and Fiona are the beautiful twin daughters of the Howard family, a high-ranking noble family in the Kingdom of Saran. When they were young, they were victims of a fire, leaving Celestine with a large scar on her face and Fiona with a weak constitution and unable to speak. Meanwhile, Fiona and the prince are having an engagement party, and Celestine shows up wearing a mask...!?

[Original Manga](https://www.cmoa.jp/title/294083/) While the Imperial Palace bustled with the struggle for succession, the Fourth Princess, Via, was growing anxious. The reason — her lecherous stepfather, the Emperor, had hinted that she should become one of his concubines. Until now, Via had lived quietly under the guise of being frail and sickly, keeping herself out of sight. But remaining still would only make her situation worse. So, she decided to propose a temporary concubine contract to the leading candidate for the next emperor — the First Prince, Alec…!