No premiere date announced yet. The source is from the official twitter account. Synopsis of the first season from AniList:
Amane lives alone in an apartment, and the most beautiful girl in school, Mahiru, lives just next door. They’ve almost never spoken—until the day he sees her in distress on a rainy day and lends her his umbrella. To return the favor, she offers him help around the house, and a relationship slowly begins to blossom as the distance between them closes…
Have you already watched it once? It’s my favorite romance anime of last year (probably even last decade, not counting in romcoms)
Yeah, I enjoyed it but I wouldn’t consider it my favorite romance of this decade. So far I think Insomniacs After School took that spot for me. Ice Guy and His Cool Female Colleague was also a solid romance anime too.
For me, Insomniacs After School felt more like a coming out of age highschool slice of life than a romance. Counting in romcoms, the dangers in my heart and Love is War are my top contenders
Dangers in my heart is so good! Insomniacs After School season 1 is pretty slice of life-y, the start of the romance happens towards the end. Season 2 is definitely going to be more about the relationship between them