People malding about Seto's reservation are really missing the point, hard. It's not like Seto doesn't like Anjou (should be obvious to us) or hates the idea of intimacy with her or even any lack of guts or whatever. It's the total and complete lack of groundwork with safe baseline intimacy within their relationship, or even Seto's life as a whole. All his life he's lived in an environment, where anything of the like isn't taken well and is to be chastised. You don't make passes at people, you don't sneak peeks and you especially don't get handsy. He plays it safe, too much so for us with a bird's eye view, but he does it because the last thing he ever wants to do here is to lose. Even their most emotionally intimate moments together are about other people expecting promiscuity off of Anjou and hurting her by just leaping in, making it the number one mistake Seto never wants to make. No step forward without a safe foothold, ever.
And what does Anjou do? she constantly pushes that envelope. But afterwards? She pulls back. Plays it off as a joke or makes fun of Seto for the position they are in and resets their relationship all the way back to the safe neutral they were in. She just raises the stakes more and more, making it riskier and riskier for a misstep, without actually taking the step and staying there. No safe footholds given. A masterclass in self sabotage. It's obvious that if you care about a game of poker and an opponent just goes all in from from a new card, that you fold while your losses are low. When the stakes are high and your hand has no assurance, you just don't go in if you care about the game.
They both are kind of at fault for this (a bit of a cop-out, I'll admit), but the ball is definitely in the court of Anjou here. Instead of endlessly raising the stakes and making the leaps of faith longer and riskier and the cost of missteps harsher, she needs to take steps forward in their intimacy without pulling back to ensure a new neutral level to be in and go forward from. Lower the stakes and show more cards to make the hand surer. That's where you can play forward. After that trust is formed and intimacy in the relationship has actually advanced, you can start poking it and fooling around with it. What you don't want to to do is make a rickety scaffolding and then take a golf club at it's base. Nothing gets built and the higher you are, the farther you fall. I thought this was just the most basic relationship 101 you could get; A step forward for a step forward in a two player game.
I thought we were in here to see two very different people make mistakes and learn from them to grow together, instead of just making all the mistakes at once and landing on the correct answer by pure luck.