Kouta Akiyoshi is a 16-year-old high school student, who is also Mayu's next door neighbour.
Obsessive
Media: Trick or Kiss
Recently, Mayu's 8-year-younger neighbour Kouta Akiyoshi has been avoiding her gaze. Mayu passed it off as Kouta's teenage rebellious phase, but little did she knew about the hidden feelings in her young neighbour's heart.
Character: Hideo Ozaki
Hideo Ozaki is Yuriko's childhood friend. While they often played together when they were young, Hideo drifted away and grew colder towards Yuriko in the recent years. He had graduated from the military academy, and is the second lieutenant of the army.
Character: Shiba Junichi
Shiba Junichi is a self-made wealthy businessman who came from poverty. On Yuriko's birthday party, the man made a striking entrance and saved her. A few days later, he came to her manor to ask for her hand in marriage.
Media: Butterfly’s Poison; Blood Chains
Yuriko Nomiya is a young aristocratic lady. Despite her family's less than ideal financial situation, her parents decided to throw a lavish party for her birthday. Little did she know that the fateful day will be the start of her misfortunes.
Character: Abyss
Abyss is a game character created by Wang Zi Xin that had developed self-awareness. While he can be scary and merciless, there is an innately kind and good-natured side to him.
Media: Kiss the Abyss
Wang Zi Xin is a game creator. One day, when he walked out of the building after work, a young man who looked exactly like Abyss, the game character he created, stabbed and killed him abruptly. Instead of death, he finds himself transported back in time repeatedly to when he was just about to get off work, and the killing happened repeatedly no matter how he tried to avoid it. In an act of impulse, he kissed Abyss and got transported into the game world which he created. Now, he must aid Abyss through his journey in a death game...
Character: Lennox
Lennox is introduced at the later half of the manhwa as Jay Jin's landlord when she moved to New York. He slowly grew to be protective of her, and acted as her guardian.
Character: Clarence Ewan
Clarence Ewan is a mysterious man who first met Jay Jin while she was on a vacation. He was later revealed to be an established arms dealer, and had been plotting against Jarte since early on.
Media: 100% Perfect Girl
By chance, Jay Jin met Jarte Max at a hotel lobby when he visited Korea for a work trip. One look and Jarte knew that Jay is his 100% perfect girl. Jay is an ordinary young girl aspiring to be an artist, while Jarte is the ruler of the country Roinne. While they overcame the difference in their status, little did they knew of the arduous path ahead of their love.
Yanderes and Obsession 