This is quite normal for conservative places like japan. For them, relationship has their own stages. Not everything have to be done right of the bat. It takes time to be comfortable even with a partner you love and trust, especially something so inmate like sex
But that's the point I was trying to make though. If she's so uncomfortable with him that she can barely kiss him much less share a bed. She has no business living with and sharing the same space as him.
You say they are conservative by culture which is true, but her friend is living happily in a PROPER HEALTHY relationship with her man. I think it's just an issue with her based on her disability and exposure.
Just gonna throw it out there, but there are countless ways to have healthy relationships and they don't all look the same.
Well theirs isn't, it is made mention that the guys needs in the relationship aren't being met. And it seems very one sided, with him adjusting to fit her tune but not much give on her end.
I would have loved if the author made them have a proper communication about expectations before taking such a huge step. Because I feel like her inability to fulfill his needs will pop up sometime later on. Maybe while he's back in Germany, or with the introduction of another women.
I think this manga teaches us that intimacy can come in many different shapes and forms. For instance our MC is deaf/mute but she her "words" can reach people's hearts. Her and the ML's relationship feels more intimate than one that is just physically intimate couple (like the hairstylist with his casual flings). I personally think being able to understand each other, bond with their friends and family, and communicate is truly more valuable than intercourse.
Now the reason why they move in before being physically intimate is because of the time factor. Our ML is working towards going abroad and they only have some much time together. I think it's valid to increase the time they have together by moving in. Like I said earlier, they're connected on a much deeper level than just sex. Once you have a strong foundation, sex can come later (pun intended).
Maan I'm so confused with their relationship. Cause who tf moves in with a guy, when they are still so shy to kiss, touch, sleep in the same bed and haven't even had sex. Like why the hell was Itsoumu sleeping on the couch in his own home! Lol she's light years too early for a relationship that serious with the rate she's going.