How would this play out?

[AvatarTrev]

This may have an obvious answer but it was an interesting interaction i had recently. I had Number C62: Neo Galaxy-Eyes Prime Photon Dragon with the regular galaxy eyes as an attachment, making it unaffected by opponents monster effects. If it attacks into a Number 105: Battlin Boxer Star Cestus, which then activates its effect, how does the battle play out? I would still take the damage correct?

Number 105's effect for reference.-Once per Chain, during the Battle Step, if your "Battlin' Boxer" monster battles an opponent's monster: You can detach 1 material from this card; negate the effects of the opponent's monster while it is face-up until the end of the turn, that monster you control cannot be destroyed by that battle, also your opponent takes any battle damage you would have taken from that battle.

[Christen57]

I would still take the damage correct?

Yes. The part of 105's effect, that redirects damage to you, affects you, not your monster.