Sleeps In Sunbeams's manga / #naive male lead(2)

15yo student and aspiring artist, Yuka’s grandmother has been hospitalised with a stroke. He saw his new neighbour Gotou kissing a man on the doorstep and found out that the man with the beautiful face was his new 23yo math teacher. Determined to fill his grandma’s shoes as leader of neighbourhood watch he posted warnings over Gotou's door and would only stop if his new sensei let him draw him. So started a romance between Yuka and Gotou that was really quite intense. Sensei started out resistant to Yuka’s charms, but the more he learnt about the positive spirited boy the more he was drawn to him. I liked how the mangaka focused on the emotions that were evolving within and between the MCs.