theres more people that had a hand in this stupid scheme, but im glad that loser got that icy stare.
No, it's not the same.
The other guys (I think there were 3 specific guys) were being nuisances but you could say it was all in good fun. They never forced Taiki to do anything and Taiki was free to tell them to take a hike at any point and only didn't because he's too nice.
What this guy did is an actual crime (false imprisonment) and I would totally be going over to the police (or at the very least the school) about it if I were Taiki or Chinatsu.
I see some people complaining that the quality of the manga has dropped or that the author doesn't know what else to write, but I don't think so at all. He clearly has some plans left for Taiki's friends' stories to resolve while we see more of Taiki's and Chinatsu's relationship develop. Not to mention the necessary developments regarding the sports clubs and Chinatsu's graduation + Taiki's 3rd year. It's annoying when romance manga finish right after the couple is established.
This chapter could be considered filler, but it's always nice to see that Chinatsu cares about and trusts in Taiki as much as Taiki does for her, given that we usually only follow Taiki's perspective.