Sasori to Otome: Scorpio & Virgo

Tohru Saotome is a famous novelist suffering from a massive case of writer's block. While in the midst of this slump, his long-time editor is transferred, and his new one ends up being his former classmate Kazuha Sasasori. Kazuha is the only person Tohru has ever written a novel for, so things are awkward between them, to say the least. Why did Tohru write a story for his classmate in the first place? If you ask Kazuha, it's because Tohru was in love with him in high school...