The ending scene of the current volume is the mc's lil bro visiting big bro at the university gate. Most likely that the 3rd volume will circulate around mc's shitty parents. Idk what were the problems big enough for them to have sent their prick alpha son to fetch the mc but if the 3rd volume doesn't show the parent's guulty expessions then ISTG, i'll dive into my phone and smack the shit outta them
I wouldn't say it's chapter 1 in full. It's a preview of volume 3. They usually do these for digital copy of mangas. The order of pages is not right either (we can't say it's page 1 etc). In fact, those pages doesn't connect with how vol 2 ended. Example, how did Miyabi got a copy of Yamato(bro)'s test results? How did Yamato know where Miyabi works/study at? Miyabi and Yamato are talking calmly to other this we can assume they talk through phone before hand or those pages from chapter 1 vol. 3 aren't right after the other.
hmm. I really like the second volume. what really got me was the "I don't want to be weak anymore" moment. that was so important and a rare gem inbetween all the mangas with weak storytelling when it comes to difficult interpersonal topics