Well, I said the confession was poorly timed and primed to cause trouble. Trouble has arrived! Now all the sharemates are antsy while Hiromi uses the word like an executioner's axe.
Team Tsubasa is spinning, but I'll give us a lttle cope- this is Sasuga Kei, her characters have come back from worse. (Remember that Domestic Girlfriend ended with a comatose-from-behind victory. She took several L's but she's not out of the race.
My hopeful take on Tsubasa is that this low point becomes a wake up call, she fixes her bad habits, and she crawls back to the top. Stop running from problems, stop abusing the booze, learn some emotional regulation and communication skills. Long term, this is a good thing for Tsubasa if it kickstarts a training arc. Seeing a character get focused growth is a sign she's headed for greatness.
How badly did Tsubasa mess up? She messed up her confession, and hooked up with a coworker while feeling pitiful. At best I think she'll feel ashamed and regret that she'll need to work through. She might continue to self destruct if she doesn't get a handle on her emotional crash-out. Worst case is she becomes entangled in a work relationship or gets in trouble for messing with a coworker. Loss of job would really sting.
Hey, I noticed that Tsubasa and Hiromi are on opposite arcs:
Hiromi- returned home, reconnected with an old flame, went to hotel with her but didn't have sex, got invited to a date. He's taking it slow and cautiously.
Tsubasa - Left home to force a visit on Hiromi, got rejected, went to hotel with coworker and had sex, has hurt her chances of dating Hiromi. She's forcing things and taking chances.
Last interesting thing is Hiromi's reaction to the confession. Anju said he was being dense, but I'm not sure. I think Hiromi didn't expect a confession but he knows the sharemates are into him. When Tsu said "I want to be with you forever" Hiromi figured out it was a confession and decided to turn her down gently. He's not ready to start a ship, and he recognizes that it could ruin the sharehouse. So he made the best choice available and set a boundary for sharemates. It's the least damaging choice. Imagine how much worse it would be if he rejected her bluntly, or accepted?