That's an absurd reduction of the circumstances, to the point that I originally questioned if you skipped chapters to get here.
Literally everything is different. Shou had no interest in Fujieda and made it clear, only for her to expose herself to him, forcing Shou to categorically reject her again.
Sensei-- who is only capable of deflecting, rather than rejecting Shou-- has a noticeably burgeoning romantic and sexual interest in him that she can barely suppress in their interactions (and has all but given up suppressing in her privacy). Like, look at her body language on the antepenultimate and penultimate pages of this chapter. Look at her verbal language. Tell me that's the same as what happened with Shou, with a straight face and pants not on fire.