Reader-added tags include "The udder terror of Sanae-san" (originally punning on "kyoufu" (恐怖, terror) with 胸 (chest/breast) as the first kanji), "Big boobs, big dreams, big Sana-nas", and "Aren't yours bigger, Missus?"

(doesn't get the connection between the first 2 panels and and last 2)

AyaReiko said:

(doesn't get the connection between the first 2 panels and and last 2)

The Japanese Red Cross runs promotions where they give out these sorts of things.

That's encouragement enough!

Around WWII The American Red Cross --- well, their own funny version [ International Federation ]: they split off in WWI and created their own because they objected to the Red Cross ideals [ original: International Committee ] of mercy and aid being applied to the other side equally, since the other side are obviously devils --- had blood drives in caravans, hiring pretty pulchritudinous girls just to act as greeters and thankers to the donators.

Person gets a smile; enters caravan; gives blood; stares at breasts; gets warmly thanked: totters off.