The author will have to make a serious effort to show why MC should be with Agave and not a cute childhood friend. At the very least, the childhood friend must have a serious character flaw, perhaps after she starts having sex herself - she'll forget about Goto right away.
Rather than Akito having flaws, do Goto even actually know shit about Agawa? I honestly don't remember much about her, she's a slut, a gyaru, her sister is a bitch, and she has daddy issues, I guess that's it?
We can probably say the same about Goto, at least I don't remember any mention of baseball, does he have anything else besides being kinda of a weirdo and being obsessed with Agawa?
The story so far was more or less about sex and Goto being obsessed with Agawa, so maybe Akito introduction, Goto playing baseball in the past, and assuming by last page that Agawa likes videogames, it'll introduce more stuff besides the sex shenanigans, give them more personality.
Or at least that's what I hope, because before the change it looked like the story was going to ge more or less a repeat of the original.