>> Name That Anime or Manga. V.1

[qraphic]

Dont know, but sounds sort of familiar

A boy finds himself stuck with his 2 step-sisters that each have a huge crush on him. What anime is it?

[scmarshtacky]

I'm not sure, but I know Kotau's is Fruits Basket.

A high school detective is turned into a child by a criminal organization.
(I'll be very excited if someone gets it ^^)

[Yuuya Kizami]

Detective Conan ?

The first female president of a high school who also secretly works as a maid

[scmarshtacky]

Yep ^^
Kaichou wa Maid-sama.

A tale of a skilled vagabond samurai who was an assassin in the past; he now prefers peace to fighting.

[qraphic]

Don't know

4 boys who are actually wolves form an unlikely friendship on their journey to paradise. What anime is it?

[Hikineet]

Wolf rain =w=

This might be hard!
A student who is actually a britannian prince gets a power called Geass(?) which lets him control one's actions only once, he rebels against the country and tries to get revenge from his father.

[qraphic]

don't know owo

2 boys surface from their underground pit and battle gunmen

[qraphic]

^

[scmarshtacky]

I don't know...
@Lost One's Weeping: Code Geass

This might be kind of hard.
Individuals who "do not exist." They work for the government and eliminate those they deem 'evil.'

[A*Viola*Named*Steve]

No idea.

A girl who joins a defense force has to deal with a vertically challenged, short-tempered, supposedly verbally abusive instructor and parents who think she should be more...girly.