I’m looking for a BL novel. Characters have a system and the MC has a weak system and was abandoned by family and fiancé. The ML is a marshal/general and has 2 systems, a military system and an entertainment system. He is secretly an actor and helps the MC. The MC and ML are engaged. The MC is taken by his mother’s relatives.
rather than weak system, is it probably no system? might be The Interstellar Male God https://www.novelupdates.com/series/the-interstellar-male-god/