I've already asked for this once before but it is quite some time ago so I hope that something new has appeared or someone has read something and can recommend it.

I really want to read a manga (or manwha or whatever) where there is a 'bad' or 'evil' guy who is nice to this one girl or boy. An example is the demon(Kainen) in Masca though he isn't as bad as I would like.
I really like it when there's a really powerfull character who normally is evil or bad (like, he might kill people or torture or something along those lines) but then there is this one person whom he likes (or he is nice for some other reason) which he is nice towards and might even obey (or listen to).
Especially if that person is a really good (and naive) person.
The 'bad' guy may be turned into a more-or-less good guy by the sweet person.
Please, a not-too-dark story (and a happy ending is very much preferred)

Other than that, I am looking for stories involving bodyguards. The bodyguard should be an adult male (not too macho) and the protected should be a younger (not shota!) male. Some romance and a lot of situations where the bodyguard has to save and/or protect the young male.

This got at bit specific ^^' if anything matches all that it would be lovely but if something just matches a small bit I would love to hear about it.
I like yaoi, shounen-ai, shounen and shoujo (though not so much). I can read het-smut(boy and girl) but it's not something I like that much.

Thanks in advance!

PS. I've already read:
Masca - This is the one that fits best together with Hanatsukihime
Hanatsukihime
Owari to Hajimari no Miles
Koori no Mamono no Monogatari

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It can't rain all the time

Bodguard: Sexy Guardian
there is also a tag: http://www.mangaupdates.com/series.html?category=Bodyguard

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currently reading: Nyotai-ka
please support me

Rebirth - the Dark Magician Deshwitat Lived Rudbich
Togari - Tobe
Akumetsu - Hazama Shou

Shi ga Futari wo Wakatsu Made badass blind swordsman he isn't exactly evil but he is a bodyguard

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Thankyou so much! These seems great! I haven't read them yet but so far they seem to fit almost perfectly

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It can't rain all the time

I think Guin Saga fits the 'bodyguard' request pretty well.

For the first one; Silver Diamond should be okay - it's from the mangaka who wrote Koori no Mamono no Monogatari, after all.
You might like Uragiri wa Boku no Namae o Shitteiru as well.

Madness fits perfectly as a bad guy story but its yaoi

Rensou no Aria

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Bodyguard/shounen ai:
Keep Out (KISARAGI Hirotaka)