Main Characters:

Miki Koishakawa: Her parents went on a trip to Hawaii and decided to swapspouses with another couple. As a result, they all moved into her family'shouse and she gained a new "brother" Yuu. When she was in Jr. High, she was in love with Ginta and wrote him a "confession letter. Ginta rejected herthen. Now he likes her but she really likes Yuu, who is always surroundedby girls. She used to work at Bobsons, an ice cream shop where she met Kei Tschuchiya.

Meiko Akizuki: Miki's best friend. She loved her teacher Shin'ichi Namura,who returned those feelings but when their relationship was discovered, hewent back to Hiroshima.

Yuu Matsuura: He always teases Miki, but won't reveal his true feelings forher. When he was 12 years old, he discovered that his father was not hisreal father. He believed that his real father was Yoshimitsu Miwa (who hadbeen his mother's professor) a famous architect. For this reason, he has an interest in architecture, and becomes friendly with Satoshi Miwa(Yoshimitsu's son). In Jr. High he had no steady girlfriend but did go outwith Arimi Suzuki for three months.

Ginta Suou: When he was in Jr. High and rejected Miki, it was because hewas surrounded by his friends when he got the letter. Now he really likesher but when he realizes her feelings for Yuu, he decides to go out withArimi instead.

Satoshi Miwa: A ladies man who is seriously interested in Meiko. He hangs out with Yuu sometimes.

Kei Tschuchiya: Has a big crush on Miki. His parents used to force him toplay the piano so he rebelled and ran away from home. He tried to take Miki away from Yuu by tricking him but it didn't work. Because Miki encouraged him, Kei plays the piano again.

Summary:
Basically, the summary is all in the character descriptions.

Slashable characters:
All the boys are pretty so let's start!

Miwa/Yuu: Miwa seems to be a take charge kind of guy. Because they hung out together a lot, rumors started flying around that they WERE a couple.

Yuu/Miwa: I don't see Yuu as the seme.

Ginta/Yuu: Ginta is very passionate (dramatic) so I can see him declaringhis love for Yuu.

Ginta/Miwa: While it would be pretty to look at, I don't see it. Miwa wouldbreak his heart.

Kei/Yuu: I can see that. Kei is passionate and manipulative, if he werewith Yuu, he'd probably have to trick Yuu into it.

Ginta/Kei or Kei/Ginta: If they were together they'd be very possesive. ButI'm sure the sex would be hot!

Namura and any of them? No, he seems way too responsible for that and if he quit his job over his relationship with Meiko, it isn't happening.

Links:
I haven't seen a lot of Marmelade Boy slash fic but there was one that I
saw yesterday that is more like porn if you're into that type of thing: ie:
an orgy.

http://www.geocities.com/marmaladelemon/ginta6.html