What are the names of the songs played by the guitar in the last episodes of the TV series animation "Kiss from Heaven"?

This episode is called "Baby" and is sung by Nagase Arashi and his voice actor Shui Gu Jie Jun. (e.g. animal fetishism)

Lyrics: If only I could cry at the top of my lungs/

Kiss your lips/give you a kiss from heaven/

I can't stop crying/because you are so pure/

I can't stop crying/It's so nice of everyone/

I'm sobbing/I'm almost destroyed/

I can't stop crying/because of your innocence/