I'm not really into shounen ai or shoujo ai, nor am I into yaoi or yuri...but does anyone know of a manga about a boy and a girl falling in love with a guy? Are there any? I could have sworn there were...
There are some... The most famous one is probably Atashi wa Bambi.
I'm not really sure, since I stopped reading it, but I remember that Obaka-chan, Koigatariki was appointed in other threads as having something like that. Billion Princess probably fits too.
Himitsu no Shitsuji-kun is not exactly what you are looking for, but also portraits a girl and a boy who are in love with the same guy. The ending is a little unexpected, so I'm not sure if it would fit.
________________ "ITs so warm that, Before the snow has a chance to stick, He melts it for me." ... little things are the ones that still keeps me from giving up