PQube has dated Muv-Luv and Muv-Luv Alternative:

PQube (Bristol), 23 May 2018 – PQube and ixtl are pleased to announce that both Muv-Luv and Muv-Luv Alternative will be released in Europe on June 8, and in North America on June 12 for PS Vita – releasing both physically and digitally.

Muv-Luv, which contains both the ‘Muv-Luv Extra’ and ‘Muv-Luv Unlimited’ storylines combines with Muv-Luv Alternative to complete a Visual Novel trilogy, widely considered to be among the best the genre has to offer.