because it's not. take doesn't like mine, nether does mine like him, even the sex is somewhat forced between them by hiroi. mine can barley stand take outside of having sex with him to please hiroi.
hiroi doesn't love mine and is just playing with him, and take knows it.
take and mine relationship might've started from love but it got colder.
the end hints at hiroi finlay realising that he is slowly being left out, this is somewhat proven by other works of the author showing only mine and take having sex and hiroi is left out.
take and hiroi relationship might've started from love but it got colder.*
imo there’s not enough scene where the three of them appreciate or shows affection to each of them. take and hiroi’s relationship didn’t get any spotlight at all, NO EXPLANATION. mine is the only one who shows equal affection to them