There's a lot o speculation on Tumblr about this, not only they have same height and built but if you check Kagura has some piercings holes in his ears (but no earrings? Shady) and Ogawa posted a long time ago a drawing of Senzaki in his usual version and a "nerd" version, I SWEAR the nerd version is exactly the same as Kagura! Also Kagura has some nasty eyes on him, same as Senzaki, but since sensei haven't confirmed this yet I won't make assumptions :v I would love that tho, one of my fav couples ples
I personally think not cause in their final chapter Ogawa said "well this is the end for them, etc, I thought about removing Tatsumi from the game or making Senzaki join the school but I just didn't liked that, I will add more chaps about them after caste haven is finished" which is a let down BUT check the chapter that Tatsumi meets with Kagura the first time, he literally freezes because he thinks that is Senzaki, the smirk that Kagura gives him all the time is weird too and just a couple of chapters after, Kagura is walking with Tatsumi and says "people change blablabla" and Tatsumi says "I know a guy that never changes no matter how he may look like" DUDE THE HELL???? Look, I'm not saying sensei changed her mind, but why not? Yes it would be hard to hide tattoos and all but everything seems possible in this school so ....
As far as I love Ogawa this is becoming one of her worse works in my opinion, so confusing, it's like they're living in a dystopian world but she didn't explained, it's been years and the same bully set up. I get it that is a metaphor for the "real world" and social status as a whole but as someone who comes from Latin America and has seen with my own eyes REAL social issues, yes bullying and suicide might be main issue in Japan but in real life bullying can be easily fixed in comparison to other deep shit in life, maybe they don't feel like that since the culture doesn't allow you to speak up etc but tell me what is your point with the manga? That bullying is bad and society sucks? We know that baby, we're westerns, we're having mass shootings in schools here! It just gets worse and worse and can someone bring back that hot alt guy with the back tattoo? That babe kept me going no joke