Today Tsubaki streamed a selection of their Hinafes Performances and added something nice: A new single announcement. https://youtu.be/oVlmyYrMCcQ?t=1098
Title: Dansha-ISM / Ima Nanji (断捨ISM/イマナンジ？; song order undecided).
Nothing known about it yet, though. At least Anju gave us a snippet of an MV. But then again it's 3 months until this single comes out.
(Also: Gee Tsubaki! How come Up Front lets you have two singles this year?)