From DramaQueen :

Kenzo Shinozuka is a talented but under-appreciated pianist, so when wealthy nobleman Lorenzo Carlucci offers to be his patron, he leaps at the chance. However, being patronized by Carlucci exacts a price that the pianist may not want to pay. For Carlucci is an eccentric and demanding patron, whose temperament often clashes with Kenzo’s own stubbornness. The friction between patron and artist threatens to drive them both to the brink of madness, or that of desire.

But, it is undeniable that Kenzo’s talent flourishes under Carlucci’s patronage. Can Kenzo overcome his pride and the ghosts of his past to finally achieve greatness?

From Aerandria Scans:

When she merges her soul with that man, she will become the Goddess of War!

Itsukushima Hinata is a cool high school girl who lived a normal life, but one day, all of a sudden, her life became not so normal anymore. The strange man that suddenly appeared insulted her best friend and enraged her. He's a mysterious man who has a costume like that of someone who just woke up from ancient times. While Hinata is still confused, that man hugs her out of the blue! And then, she transforms...?!

From Game Over or Continue:

Takahashi Miya is sick and needs regular check-ups. At university, he comes across Kanou Rei. Rumour has it that he is part of a dangerous club that distributes drugs and organises sex orgies. Is this true? And why does Rei seem to know Miya?