He's supposed to have some flexibility- but he is designed like one on a lot of levels. He's not a very satisfying male MC.
Too tiny and he doesn't get good scene content. The game is mostly focused on Lena and corruption. The men who can cuck him are larger, more attractive, have better scene content, and awful personalities. He has one 3some in the game and it is sharing Allison with one of them. A lot of his content is jerking it to pics of better men fucking his potential LI. If he shows interest in more than one woman he basically gets kicked out of their route content. Hell, every rotation one of his scenes is literally just the same art as two other generic male characters who can get swapped out for him.
Game is heavily focused on Lena. Ian is an afterthought- and he looks like a little bitch.
I was a massive fan of Good Girl Gone Bad (as you can tell from my sig perhaps haha!)
But I only like to play female prota games and rarely play male prota or games where you have a male prota and a female prota. In general I find it loses focus and the more time you are playing the other prota just has you sitting there wishing you were still playing the main protagonist (Lena in this case I think?)
So yeah for me the male prota sections really ruin the game for me, shame as the Lena stuff is really nice but the second protagonist just sidetracks from the content I want to read and see.
It is odd too as devs who make male prota games rarely have a playable female prota in there. Yet devs who make female prota orientated games often seem to feel the need to add in either multiple female protas or a male prota.
I don't know if it is just me but I hate it when a game has both a male prota and a female prota. Only time I like it is when you can select it at the start and then replay the game to see the other prota content
A few games that do this very well are;
https://f95zone.to/threads/tales-of-terrara-v0-2-8-public-thunder-one.39485/
https://f95zone.to/threads/the-world-with-no-memory-v1-0-fluffylynx.65863/
and also this one but it seems for some reason the dev has for now removed the female prota content;
https://f95zone.to/threads/contact-seasons-v0-2-ezh.64094/
I just wish more multiple prota games took this approach rather than having you switch perspective constantly throughout the game