As if things could not get any more complicated for Harima, later in the series Tenma's sister Yakumo becomes infatuated with him. Yakumo is able to read the minds and hearts of others, and so was frightened by all the lustful guys at school who had impure thoughts about her. Harima's is the only mind she cannot read. Harima and Yakumo are also animal lovers, and Harima once helped Yakumo's pet cat Iori when the feline was hurt. Yakumo later learned that Harima wrote and drew comics for a living, and not only didn't make fun of him for it, but would also help him meet deadlines. On some level Yakumo might have known that Harima had feelings for her sister, but once tried to seduce him, possibly to spite Tenma. Of course, I also like to think that the fact she got to know the real Harima that almost none of the other characters see at school was what caused Yakumo to become genuinely attracted to him, and she had respect for Harima not to pursue him.