The ending point of the Tomo-chan anime in the manga can be a bit tricky to determine. Sometimes, the anime might condense or expand certain storylines compared to the manga. You might need to do a detailed comparison to figure it out precisely.
I don't know for sure who Tomo is in this context. It could be the name of a person who is the translator or the founder of the translation project related to these novels.
A 'netori visual novel' is typically a type of visual novel that often involves themes related to relationship triangles, where one character tries to 'take' another character's partner. However, different visual novels within this genre can have a wide variety of specific storylines, settings, and character archetypes.