It's really hard to describe in what way this manga sucks at romance. It's so eerily uncanny. No 2 humans would act like this, yet at the same time it tries to portray it as wholesome. Additionally the arbitrary rules set in place to make this entire premise work are also just not held very tightly. Early on we see Liam barely be able to contain his libido at all and nearly pouncing on Sora just by being near her at night, and now he's somehow okay with sleeping in the same bed and hugging her.