That was good, but I gotta say... If Chiaki decided to back away a little or even a lot from the other two, I woundn't blame her. I'm sure she would be happy for Hono and wishes for her happyness (I think she learnt her lesson after that blunder she pulled off last chapter), but if the heartbreak is too much to bare she has the right to move away from the pain and end things with Hono peacefully without any resentment towards her... She took a risk kissing Hono, she must be prepared to face the consequence of not being able to be near the person you love anymore because of how she (Chiaki) might feel afterwards. That's how the persue for love is.
Sometimes seeing someone you love deeply with someone else might prove to be too much and, even though you still cherish that person, they already found their joy, so you have the right to look for your own. But if you want a wound to heal, you must stop poking it and that doesn't mean you can't end things on good terms.
I would like very much to see a love triangle work where the one rejected still wishes the best for the other pair, but decides to pull away to heal and look for love someplace else.