
But does it matter if you have sex or not? Going to the brothel implies sex, a sacred thing between partners (in the perspective of the seme). Even if he doesn't have sex, the fact that he's going to a place where the seme knows he would be tempted is bad enough. The fact that he first denies that he would go to a brothel implies he, himself, knows he should NOT be going. The fact he first denies that he would go to a brothel implies he would be tempted to having sex and feels he shouldn't admit to it. The fact that he went to a gentleman's club and participated already implies that if he did go to a brothel, he would participate there as well. The fact that he does not realize nor does he want to admit that he is wrong is what triggers me. The fact that it took him 2, two, TWO, freaking weeks to realize his partner was mad (because apparently going to a club, flirting with other people, and saying "girls are the best" is not something to be mad about) is what triggers me. The fact that the uke does not understand that all these implications of sex and infidelity is adding to the seme's insecurities, simply because "you are a man, you should understand" is what triggers me. The fact that he would throw away any respect and affection for his partner and even think about going to a brothel, fully knowing his partner would be angry is what triggers me.
For me, it is the fact that the uke has no respect for his partner that triggers me; yet he expects the seme to respect what his job entails. For me, this disregard of reciprocity in respect of a partner is what triggers me. The brothel is simply the tip of the iceberg. The sex or implied sex is simply the OBVIOUS thing the seme points out to the uke because he's too dim to understand the other implied ways he's hurting the seme.
Sorry, I didn't mean to sound angry, I was simply trying to find a way to explain what triggered me. I didn't mean to thrust an essay at you.

Additionally, (sorry that I'm adding more) some may ask or wonder if the seme should simply TRUST in the uke... but when has the uke ever been trustworthy as a partner?... I don't know if he's trustworthy to you but to me, I wouldn't trust him to be a monogamous or even a good boyfriend... so to me, if he were to even think about going to the brothel, no matter how much I love him I would know that inside my heart there is at least 1% chance of him being untrustworthy. Sorry again that I added more but I'm lacking in sleep and I thought it would be a good idea to read manga then rant about what I disliked about it... smart idea (〜 ̄△ ̄)〜

The uke did nothing wrong. I work in the business field and his actions are realistic. He did what he had to do to close the deal. I have friends that are Sales Engineers and when they're trying to close a deal with foreign companies that's what they do. They take them to Hostess bars and High end Strip clubs depending on the person's interest.
Would you rather lose a million dollar deal?
Also, I don't think the uke would ever cheat on Ryo. He's sprung!
I'm so triggered with this latest update. I shouldn't have read it. I'm just so disappointed with the uke... I'm not even angry, it's just pure disappointment. And the cop out of "sex fixes everything" is just really distasteful in this chapter... I was so excited for this update and it broke my heart that I couldn't even enjoy the chapter because of this horrible character. I loved how the story was going until this chapter... I love this story but... I'm hesitant to continue reading it if their relationship is going to be this toxic. I'd be fine if they established their boundaries about openness (seeing as the uke wouldn't be opposed to going to a brothel) but there was NOTHING about communicating their boundaries. The seme clearly wants monogamy but if the uke is unwilling to respect the seme for the sole reason of "you're a man so you should understand too", I want nothing to do with this manga. My heart broke because I know how much the seme loves the uke, yet if they were real people, I'd encourage the seme to leave the relationship as soon as possible.