YAOI or any ROMANCE manga where their story started with a KISS...
It doesn't matter if the kiss was accidental or a punishment game...

Something like this manga- Batsu Game (Conro)
The Seme kissed the Uke because he was IT in a punishment game..
It would be a major plus if they are strangers who started to get to know each other's...
Thanks in advance!!!!

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"The world is a dangerous place to live, not because of the people who are evil, but because of the people who don't do anything about it." <BR> - Albert Einstein

Okujou no bai-bai
Houkago no fujun
Two colors
Junketsu drop
Wana wana kiss first story
Kedamono Kareshi! (Last chapter, spoil me till I get tired of it)
Close your eyes (Hidaka Shoko)
Uwasa no Futari (Megu Iroha)
Hatsukoi switch
Blue sky complex
Some of these might not exactly fit your criteria, involving one party already harbouring feelings for the other but the kiss is still the pivotal point in their relationship.

Thanks

________________
"The world is a dangerous place to live, not because of the people who are evil, but because of the people who don't do anything about it." <BR> - Albert Einstein