Scenario 1:
outer and sci have been friends for a while, but outer gets concerned when sci changed he got in a depressive state staying in his lab for long periods of time. he was doing tests on himself, not wanting to let outer know what he was doing to himself.

Scenario 2:

 (this one is naj)   sci was a very introverted person staying after school in the lab working on extra projects without the teachers permission as he was busy one day outer walks in looking for the teacher as he catches sci red handed.

Scenario 3: custom