Similar to 置き傘

Charity (Christian virtue)

Tit for tat

Ren (philosophy)

Kindness

Green-beard effect

Light triad

Altruism (biology)

Solidarity

1-Chloro-9,10-bis(phenylethynyl)anthracene

Bellator Champions Series 3

Canon EOS C300 Mark II

EPCglobal

Flash animation

Hello Games