I think that new guy used to like Kiyoko but gave up after seeing that she was too occupied with taking care of others. That's why he's warning Mikoto. I can understand why she's that way. I was the same too. She finds purpose when she takes care of others and likes feeling needed by other people. But the problem is that she'll never be satisfied if she's by herself or her partner and she'll never depend on anyone else. She needs more people to take care of to feel like her existence is important. She doesn't feel like her other traits are attractive or loveable. I've been that person and trust me, that's the most loneliest thing you can experience. That's why even when Kiyoko dated tall guys, it didn't work. Like the saying goes "If you can't love yourself, how can you love someone else?". I think she'll have to come to a huge realisation if she truly wants to date Mikoto.
I think that new guy used to like Kiyoko but gave up after seeing that she was too occupied with taking care of others. That's why he's warning Mikoto. I can understand why she's that way. I was the same too. She finds purpose when she takes care of others and likes feeling needed by other people. But the problem is that she'll never be satisfied if she's by herself or her partner and she'll never depend on anyone else. She needs more people to take care of to feel like her existence is important. She doesn't feel like her other traits are attractive or loveable. I've been that person and trust me, that's the most loneliest thing you can experience. That's why even when Kiyoko dated tall guys, it didn't work. Like the saying goes "If you can't love yourself, how can you love someone else?". I think she'll have to come to a huge realisation if she truly wants to date Mikoto.