Single-Father

♀ Dad x Childhood friend.
Divorced Parent.
Baby.

♂ Dad x Detective.
Child.
Widower.
Child of a relative.

♀ Dad x Doctor.
Child.
Parent and child not related by blood.
Divorced Parent.

♂ Dad x Kindergarten Teacher.
Child.
Divorced Parent.

(Also includes and extra story and the story of the son as a teeneger)

Spin-Off of Ookami Papa wa Hitsuji Tsura shite Yatte kuru (Also Single-Parent Manga)
http://www.mangago.me/read-manga/ookami_papa_wa_hitsuji_tsura_shite_yatte_kuru/

♂ Uncle x Kindergarten Teacher.
Child.
Child of a relative. (He doesn't take care of the child full time, just picks him up from school sometimes)

♂ Dad x Kindergarten Teacher.
Child.
Divorced Parent.

♀ Dad x Guy
Child.
Divorced Parent.

(It includes other stories)

Spin-Off of Kozure Ookami.
http://www.mangago.me/read-manga/kozure_ookami_inoue_satou/

The children get older, the story continues, focusing on the middle and youngest son.
♂ Dad x Step-Brother
Baby.
Divorced Parent.

The second story.
♂ Dad x Part-Time Bakery
Child.

Includes rape.

♀ Dad x Waiter.
Baby.
Widower.