>>37519652Yes.
Miko said way back when that 35P need not be afraid of Suisei and at the end of the confessions scene Suisei chose the Hoshiyomi. That is clearly because the confession scene is based on real events: They made an agreement to marry after graduation if they're still tight, but not before. There are no dates, no sex, only friends hanging out and cuddling platonically.