Karthik Goenka seems to be another level of selflessness. Him not going to office, so that shubham and Manish could spend time, because they had just met, had my heart. Even Karthik's misunderstandings regarding Manish has cleared not long ago, even he must be wanting to spend some time with his father, but not caring about his own feelings, his own want, he stayed back , understanding that Manish and shubham's relationship needed progress which was possible if they spend time together.
The way Mohsin expresses that suppressed sadness. You can see at the same time not see the pain on his face, the slight tear in his eyes, because his expressions are so light, which gives it a non over dramatic feel and realistic look.