If you're looking for anime similar to Rafnas, you might like these titles.
Leaving the earth after marriage, a woman is left behind in space when her husband suddenly dies of a cosmic disease. Her friends on the Earth head for space to save the woman who was once everyone's ideal lady.
Haruki spends most of his time with friends and fellow classmates Airi and Ayana. All seems well, that is until Airi and Ayana form separate clubs, the Mechanical Science Club and the Chemical Science Club. The two vie for Haruki's attention and hilarious chaos usually follows all attempts to make him join.
The official music video for Subarashii Shinsekai by Bajune Tobeta & Bonjour Suzuki.