Koh and Yukako were close friends as children until Yukako had to move away due to family debt. Still, Koh remembers Yukako as his first love. Years later, he claims not to be in love with her anymore, yet he only dates girls that remind him of her. Koh and Yukako meet once again, and although Koh has stayed the same, Yukako has changed -- she's frail, has to steal to eat, and is living with a strange man she calls her "guardian".

A one-volume work containing 4 stories total, including the title work "Shiranami no Illusion"

[From Ivyscan]:

Ryo is a boy who loves flirting with girls. One day, he met a beautiful girl named Touko by the beach. Ryo is soon deeply attracted to Touko, but because of an incident where her fiance died in a tragic accident, Touko locked up her own heart. How is Ryo going to help Touko leave her sadness and pain?

Mei is a girl that can only be described as "normal" when compared to her older brother. While she's a devoted member of her school's Wind Orchestra Club, he's a famous musical prodigy. When their irresponsible parents send a girl named Mel to live with the siblings, Mei's feelings for her brother start to seem a lot more complicated than she first thought.

Shuri Otokawa, a girl who can see premonitions of the future, has been trying to hide and suppress her special ability for 18 years. In order to start a new life, she joins the private investigation agency owned by her aunt, trying to use her ability in a beneficial way. However, her ex-boyfriend (and the reason of her hate towards men) Riki Nijihara was accidentally hired by her aunt as well, not to mention his superior performance as a private detective has thwarted her plan to have her aunt fired him. With another male colleague named Youta Kubo who has a crush on her, Shuri has to prove herself professionally worthy as well as dealing her office affairs triangle.
(Source: ANN)

This is the one shot of the movie that Sana and Naozumi starred in from Kodomo no Omocha.

A 14 year old boy, after the loss of his parents, starts researching his older brother, who has mysteriously disappeared several years before. He finds him in a strange palace, with his two friends who had also disappeared. At first, the boy is happy, but then he discovers that something horrible has happened in that palace, and he might just become a victim too.

Sana Kurata, a child actress, faces many problems in her classroom, including a major one - her bullying classmate, Akito Hayama. Sana's outgoing and friendly nature leads her to work towards correcting all of the problems around her. Her 'meddling' irritates Hayama but at the same time captivates him, just as Hayama's gloomy nature irritates Sana and compels her to change him. As these two opposites attract each other, they face many hardships which bring them closer to a mutual understanding. A story of growing up, letting go, falling in love, and falling out. It cronicles the relationship of Sana and Hayama througout elementary to highschool.

Honey Bitter meets Kodomo no Omocha. Shuri is a private detective with a special ability to read minds. She usually handles all sorts of cases, but this time she is faced with a rather unusual request. The famous actress Kurata Sana is going to play in a new film as a detective. She wants to be able to impersonate her character as best as possible so she asks Shuri if she can stick around to learn a few things that real detectives do and how they act. Despite this childish request, Shuri also recieves a more intimate request from Sana's manager, Sagami Rei, who wants to find out the reason why Sana and her husband, Hayama Akito, have decided to live separate one from another.
(Source: Evil Flowers)

High school freshmen and twins, Nae and Moe, and Ken and Takeshi, enjoy their lives as students and close friends. Until Moe suddenly dies in a traffic accident...and her corpse disappears? Between the vanishing corpse and a pharmaceutical corporation, her three remaining friends are struck with the reality that something is amiss in their world...