>>91771930We should break it down word by word
>Promise A promise is defined as a commitment to future actions e.g. "I'll get it done, that's a promise", this suggests nanashi is declaring an intention
>CollabShort for collaboration - a partnership between two or more separate entities to work together on a project
>Tomorrow The day after today, some say tomorrow never comes and as such nanashi could be making an allegory to something that will never happen
>YayayayNot actually a word but likely an expression of excitement, whatever is happening nanashi is certainly looking forward to it
Putting all this together we can come to a single conclusion, nanashi is excited by a partnership, she's promising that it'll happen but that it'll happen tomorrow - a point in the future that will never arrive, given that the name 'nanashi' means 'no-one' we can conclude that this is a paradox meant to inflame the mind with confusion and introspection - that if something is guaranteed to happen in the future then nothing is guaranteed to happen in the present.