hmm, this is most likely a bug. it should count towards a mission when you accept it in your giftbox.
I will confirm it with Nutaku

My understanding is that you did not 'win' the girl as you do with other methods. Girls received via the trading method do not count. If I am correct, this also applied to the medal campaigns a while back. They are simply added to your account the same way as if you had used an item.

I think it was kind of silly that it didn't work, but that was the explanation given to me.

I confirm what lovlov says. I've tested on all 6 Shards girls (3 during teh 1st Shard Event and 3 during the 2nd one) - all 6 times girl cards traded for shards didn't count towards "Flirt with 2 R girls"/"Flirt with 1 SR girl"/"Flirt with 3 SR girls" missions. While getting them in any other wway (any kind of Gacha, any kind of Chance Time, as ranking/other rewards during Events or from the cases in Gambit / Coliseum Gacha boxes and even as gifts from Facebook campaigns/giveaways DOES count towards the Daily Flitring Missions. So i guess only Shards Trading Center isn't included in thes "flirting" mechanics.

After reading the comment about Gift Box from Tomaa, i realized i do not remember if i had accepted it for the GiftBox, or if it was still in the GiftBox.
So i think i will trust Vic47.
And i won't consider editing the wiki for now since the lack of count has been notified as bug by Tomaa, and i think notified the support staff once on Shards 1 back then.
Thanks.

Originally Posted by lovlov

After reading the comment about Gift Box from Tomaa, i realized i do not remember if i had accepted it for the GiftBox, or if it was still in the GiftBox.
So i think i will trust Vic47.
And i won't consider editing the wiki for now since the lack of count has been notified as bug by Tomaa, and i think notified the support staff once on Shards 1 back then.
Thanks.

I'm not sure it's a bug. Can anyone confirm if the medal campaign was the same way? I think it's a 'feature' as dumb as it is.