[Chiibi]

Hmm I have some more.

xFull Moon Wo Sagashite 2002

Spoiler:

Couple: Eichi/Mitsuki
Age Met: 3 and 7
Intimacy: Best friends, later on developed romantic feelings but were separated
Conclusion: Definitive loss

However, it can be argued that the manga considers TakutoxMitsuki as an osanajimi relationship, as the child Mitsuki first met him when he was a teenager. In this case, a definitive win.

oChrno Crusade 2003

Spoiler:

Couple: Chrno/Rosette
Age Met: 12 and......Gawd knows how old Chrno is.
Intimacy: Best friends...though implied they were always in love.
Conclusion: Definitive win, though tragic ending, there is no doubt these two are an intimate couple.

oSumomomo momomo 2006

Spoiler:

Couple:Momoko/Koushi
Age Met: Young, perhaps 5?
Intimacy: Played together as children, then became engaged.
Conclusion: Implied win as they are engaged and both like each other. lol

xKirarin Revolution 2006

Spoiler:

Couple: Arashi/Kirari
Age Met: Young, separated at sixth grade
Intimacy: Friends, made a childhood promise to be married
Conclusion: Definitive loss.