Mami and Tomoki have always shared everything in life, they are identical twins, yet so different in character and personality: Mami tender and helpless, courted by boys to whom she doesn't never "no" for excessive kindness, Tomoki with a strong sense of duty and a great spirit of sacrifice, would do anything to see her sister happy. But comes a time, however, when one realizes there are things cannot be shared, especially when it is something extremely rare and unique .... just like an alien?!
Mami and Tomoki have always shared everything in life, they are identical twins, yet so different in character and personality: Mami tender and helpless, courted by boys to whom she doesn't never "no" for excessive kindness, Tomoki with a strong sense of duty and a great spirit of sacrifice, would do anything to see her sister happy. But comes a time, however, when one realizes there are things cannot be shared, especially when it is something extremely rare and unique .... just like an alien?!