because you think that being king to force yourself to someone who don't like you ? yeah you like her ? but did he try to understand her ? this action can make her hate him or avoid him more ? if you truly like someone before impose on her. you try to please her; but now you just impose your love not ask why did you rent me ?
I understand what u mean. But he is just truly might love her. And he is just asking her, he was not threatening her. However, if he will threat her with smth like family or honor, then yes, it is not alright. And about pleasing her.... it is not like he has a lot of opportunities to meet her and please her at those moments. And about thinking of "might some actions make another one to avoid more"... when u have only a few chances to talk privately with her, u really think that another should have just gave up? If, for example, that wind spirit who also fond of Ririn where to take her, should Del just give up, when she will be with him? Instead of saving or taking back her, using last chance? No. Both her cousin and Del did not nothing wrong, so, it is not a crime to try again smth using a chance. It is not like he bothered Ririn with marriage for years. They were bethroted, but after annulment, he did not pursue her for a period.
Also, about rent. At that time as i mentioned there was not smth like it is not ok for family members to get married. So, he might thought at that time it was him who was not good enough for her, or he just could not understand the reason why she annuled. SHe should have at least said "im sorry but i see u as a brother" so he can at least understand what was the reason. Just think of him not as a cousin but as a smth like not blood related but with whom ririn had happy childhood. Well, of course in the story and in the mind of ririn he is cousin and it is not right to be with family. However, he thinks himself as that stranger which has difference just in the relationship
He is so cute and kind. I know u might say that he is proposing to her while her husband away. However, he just truly loves her and justin simply asking without putting any pressure. He understand his position just can not simple let go by doung nothing. He is so kind. And yeah, at that time for Ririn it may be strange to marrie to a relative, but heeeey, he thought it was his mistake or he was upsetted her, and so got hurt, because for him it was normal to marrie from a family. So don't hate him. He is still kind and good and hurted a little. And ririn please say "i see u like my brother" u still didn't say it, so of course it would be uncomfortable for him too