Male lead falls first and chases first

Some special cases...

1 - ML is already in love with the FL by the beginning of the drama. This may be because of a long-time secret crush, some fateful past connection (see this list), etc.
    1a - FL does not know about the ML's feelings or doesn't know him at all.
    1b - FL knows about his feelings but doesn't reciprocate for some time.
    1c - FL has reciprocated ML's feelings for a long time but doesn't tell him.
    1d - leads are ex-lovers. ML always loved FL and chases first upon reunion.
1* -  ML falls in love at first sight with the FL in an early episode.

2 - two (or more) MLs/SMLs all fall first and chase the FL first. Noted only if the SML's pursuit of the FL plays a big role in the plot. (For cases where the FL likes/chases the SML first, check this list.)

3 - the ML pursues the FL openly for a long time. There are many episodes between the ML realizing or trying to confess his feelings and the FL accepting his advances.

4 - FL pursues the ML first technically but for some plot reason other than love (e.g. revenge, deception).

Related lists: Crazy-In-Love MLs, ML constantly seeks out FL, Green Flag MLs, Red Flag Toxic/Taboo Romance, FL Chases First