SCANDAL will be releasing this new single on 20th April. The song ハルカ is the theme song for the upcoming 3D anime film- Little Ghostly Adventures of the Tofu Boy (Tofu Kozo).
Go here to order the regular edition of this single, here for the Type A Limited Edition and here for the Type B Limited Edition. First press for the regular edition has already been sold out on CDJapan, so try to find another source if you really want to get the first-press bonus. (I managed to place my order before first press was sold out.)
Here is a trailer of the film. ハルカ can be heard from 1:06 onwards.
P.S I’ll most likely be updating this post once I can get my hands on the cover pictures for the single.