Ai to Yuuki no Pig Girl Tonde Buurin

Karin Kokubu is a normal girl until she meets a little yellow pig - Iggy. He turns out to be a prince from unknown planet and intends to make Karin a superheroine - Super Pig who literaly is a pig. Karin is not happy with her image but gives it a try and uses her superpowers to help others (and sometimes herself), however from some moment she is worried - who her friend and her crush like more - her or Super Pig? Great story about friendship, love and courage to do normal things.