A,A'

A trilogy of stories sharing a common futuristic setting and all featuring unicorns – a rare form of bioengineered human with great technical abilities but an inability to express emotions. In the title story, Adelade Lee, a clone of a unicorn girl who has died whilst working at a remote frontier colony is sent out as a replacement but she has no memories of the three years since the original Adelade Lee left Earth (much to the distress of the lover she met during that time). In 4/4, a young telekinetic at a research station orbiting Jupiter meets and falls in love with a unicorn girl who is being kept for purposes of genetic experimentation – he brings out her emotions and she amplifies his hitherto weak powers with potentially disastrous results. In the two-part X+Y, the same telekinetic from 4/4, now a young man living on Mars, meets another emotionally distant unicorn (this one of rather uncertain gender) and, again, his feelings for the unicorn may have calamitous results.

Source: Anime News Network Encyclopedia