I mean if someone told me he'd rip his own button of his shirt just to prove Ishita wrong then make her sew it back on, while he stares at her lovely; I would tell them to get their head checked!
Even though he's a workaholic and he came back to get his files, he felt the need to spend a few precious moments with Ishita before he left for 2 days.. Surely Shagun can't say the same.
Ishita is no less.. She was loving the way he was looking at her, relishing in his attention.. She's in love finally after soo long. I just hope the pervmeet track ends and strengthens their relationship as they have finally reached a certain level of understanding.