Gist: Gudao telling Jean that despite all that, he'd rather have a single lover for eternity, since he's just a simple person (hints at her though). Yorimitsu takes that as a sign of a 'pure' relationship and calms down, telling them that she'll condone their relationship so long as it's 'healthy'. Triggering tsundere JAlter in the process.
That... rather than having many...I..., I am the kind of person whose heart is only in one place, that's what I want to say......hm... if this is how it is then it seems like you two are a pure couple right?...but...However, I will only allow up to holding hands!I... it's not like I want to be in that kind of relationship with anyone and everyone!!Can... can you understand that..., for me? Dark Alter Jeanne-san...!!Coup...!?If there is one who will stay with me forever then I'm happy!!That... that's why, what I want to say is...Listen to what other people are sayingggg!!!What are you saying!! In the first place, I didn't actually say I'm going out with this guy!?From now on too, if you remain devoted to maintain a healthy relationship then mother will look the other way!