Unsolsexual is a label on the aro/ace spectrum.
It means, for the most part to be aromantic or asexual, but with the exception of only one person you can feel attraction.
Other related terms that could be possible could include - unsolromantic, unsolflux and unsolflexible.
It's different from being monoamorous, as someone who is monoamorous can feel attraction to many different people, but only has one partner. Unsolsexuals can only feel attraction to one person, and can be in relationships with other people if they desire it however.
Flag Design
The flag was designed when the term was coined, in October 2020. The flag is the traditional four colours of the asexual flag, but lighter to show that it is a little more loose - and a strip of red was added to the bottom, red standing for love. The red was pastel however to indicate that the love is only for one person.
History
The term was coined by @-fierte on Scratch.
The word 'unsolsexual' comes from the latin terms - 'unum solum' which translates roughly to 'only one'. The first letters, 'un' and 'sol' were taken and combined to form 'unsol'. You can add '-sexual', '-romantic', '-flexible' or '-flux' to the end.