Although Chen Yu decided to continue promoting the relationship between Minami and Inomata Naoki, it wasn't something that required immediate attention.
Emotions sometimes cannot be rushed, and while at certain moments we need to take decisive action, more often feelings need to be accumulated over time.
Though human emotions are influenced by hormones and various chemicals and are often impulsive, emotions are more about the accumulation of memories.
It's difficult to develop feelings for strangers. Biological parents separated from their child at birth cannot have the same depth of affection as adoptive parents who have lived with the child for decades. That's because of the dependency and sense of security formed over the long-term relationship.
The human body is a highly precise and delicate chemical factory, with all our emotions stemming from hormonal influences.