At Aquaplus Festa 2009, the publisher announced a fighting game featuring characters from Utawareru Mono, To Heart 2, and Tears to Tiara (pictured). That makes Aquaplus’ crossover game even more obscure than Spectral vs. Generation.
Details about the combat system and platform have not been announced. Aquaplus primarily makes games for PlayStation 3 and PSP. If you’re a fan of Tears to Tiara, look for this game later this year.