BLACK MARRIAGE - VOLUME 02

Akari is completely confused: Did Kakeru really just kiss her while she was half asleep? And why did he call her "Hikaru" afterwards? All of this is bothering Akari, so that it is becoming increasingly difficult for her to treat Kakeru normally. Just as she begins to realize that she might actually have feelings for him, she meets the aforementioned Hikaru...

Volume 2 of the new series by Bad Boy Yagami -author Saki Aikawa! With spine motif across all 10 volumes!

Source: Tokyopop