Transit Girls EP5, Being questioned by Yui, Sayuri noticed her feelings and kissed. Yui speaks to herself that their relationship between Sayuri became closer. Sayuri later confessed confess to Nao and Mirai on how she is feeling now.

Transit Girls EP4, While Sayuri is asleep, Yui kissed her. Sayuri noticed it and in the next morning they result in awkwardness. Sayuri goes to her neighbor’s house instead of her home which Yui doesn’t know.

Transit Girls EP3, Sayuri thinks straight to Yui. The next day, she became sick, and Yui takes care of her which will change their relationship.